775
775 is a composite number, odd, a calendar year.
775 (seven hundred seventy-five) is an odd 3-digit number. It is a composite number with 6 divisors, and factors as 5² × 31. Written other ways, in Roman numerals it is DCCLXXV and in binary, 1100000111.
Interestingness
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
Primality
Prime factorization: 5 2 × 31
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√775 = [27; (1, 5, 4, 1, 8, 2, 8, 1, 4, 5, 1, 54)]
Period length 12 — the block in parentheses repeats forever.
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)
- Scientific notation
- 7.75 × 10²
- As a duration
- 775 s = 12 minutes, 55 seconds
As an angle
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
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
UTF-8 encoding: CC 87 (2 bytes).
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.
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.
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.
Heard as a frequency, 775 Hz is closest to:
- Concert pitch (A4 = 440 Hz): G5 (784 Hz, -20¢)
- Scientific pitch (C4 = 256 Hz): G5 (767.1 Hz, +18¢)
- Baroque pitch (A4 = 415 Hz): G♯5 (783.4 Hz, -19¢)
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.