Number

775

775 is a composite number, odd, a calendar year.

Deficient Number Odious Number Pernicious Number Recamán's Sequence Year

Historical context — 775 AD

Calendar year

Year 775 (DCCLXXV) was a common year starting on Sunday of the Julian calendar.

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Historical context — 775 BC

Decade

This article concerns the period 779 BC – 770 BC.

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Year facts

Year type: Common year
Standard 365-day year; not divisible by 4 (or divisible by 100 but not 400).
Days in year: 365
ISO weeks: 52
Started on: Wednesday
January 1, 775
Ended on: Wednesday
December 31, 775
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 770s
770–779
Century: 8th century
701–800
Millennium: 1st millennium
1–1000
Years ago: 1,251
1251 years before 2026.

In other calendars

Hebrew: 4535 / 4536 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 158 / 159 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Wood zodiac:Rabbit
Sexagenary cycle position 52 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1318 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 153 / 154 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 767 / 768 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 697 / 696 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 19
Digit product: 245
Digital root: 1
Palindrome: No
Bit width: 10 bits
Reversed: 577
Recamán's sequence: a(881) = 775
Square (n²): 600,625
Cube (n³): 465,484,375
Divisor count: 6
σ(n) — sum of divisors: 992
φ(n) — Euler's totient: 600
Sum of prime factors: 41

Primality

Prime factorization: 5 ² × 31

Nearest primes: 773 (−2) · 787 (+12)

Divisors & multiples

All divisors (6)

1 · 5 · 25 · 31 · 155 · 775

Aliquot sum (sum of proper divisors): 217

Factor pairs (a × b = 775)

1 × 775

5 × 155

25 × 31

First multiples

775 · 1,550 (double) · 2,325 · 3,100 · 3,875 · 4,650 · 5,425 · 6,200 · 6,975 · 7,750

Sums & aliquot sequence

As consecutive integers: 387 + 388 153 + 154 + 155 + 156 + 157 73 + 74 + … + 82 19 + 20 + … + 43

Aliquot sequence: 775 → 217 → 39 → 17 → 1 → 0 — terminates at zero

Representations

In words: seven hundred seventy-five
Ordinal: 775th
Roman numeral: DCCLXXV
Binary: 1100000111
Octal: 1407
Hexadecimal: 0x307
Base64: Awc=
One's complement: 64,760 (16-bit)

In other bases

ternary (3) 1001201

quaternary (4) 30013

quinary (5) 11100

senary (6) 3331

septenary (7) 2155

nonary (9) 1051

undecimal (11) 645

duodecimal (12) 547

tridecimal (13) 478

tetradecimal (14) 3d5

pentadecimal (15) 36a

Historical numeral systems

Babylonian (base 60): 𒌋𒁹𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ψοεʹ
Mayan (base 20): 𝋡·𝋲·𝋯
Chinese: 七百七十五
Chinese (financial): 柒佰柒拾伍

In other modern scripts

Eastern Arabic ٧٧٥ Devanagari ७७५ Bengali ৭৭৫ Tamil ௭௭௫ Thai ๗๗๕ Tibetan ༧༧༥ Khmer ៧៧៥ Lao ໗໗໕ Burmese ၇၇၅

Digit at this position in famous constants

π — Pi (π): Digit 775 = 8
e — Euler's number (e): Digit 775 = 9
φ — Golden ratio (φ): Digit 775 = 5
√2 — Pythagoras's (√2): Digit 775 = 2
ln 2 — Natural log of 2: Digit 775 = 3
γ — Euler-Mascheroni (γ): Digit 775 = 1

Also seen as

Unicode codepoint

Combining Dot Above

U+0307

Non-spacing mark (Mn)

UTF-8 encoding: CC 87 (2 bytes).

Lookup U+0307 on Compart ↗ Lookup on FileFormat.Info ↗

Code page identifier

Code page 775 is DOS Baltic — DOS code page for Estonian, Latvian, Lithuanian.

Code pages are integer identifiers used by Windows and other systems to refer to specific character encodings.

Microsoft code page reference ↗

Hex color

#000307

RGB(0, 3, 7)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.7.

Address: 0.0.3.7
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.3.7

Unspecified address (0.0.0.0/8) — "this network" placeholder.

NANP area code 775

The number 775 is an active NANP area code (North American Numbering Plan).

Primary area: Reno / rural Nevada
Region: Nevada
Country: United States

Most NANP area codes have multiple overlays in dense regions; the primary area listed is the historic/largest population center for this code.

Look up area code 775 ↗