Number

677

677 is a prime, odd, a calendar year.

Arithmetic Number Chen Prime Cousin Prime Deficient Number Odious Number Pernicious Number Prime Pythagorean Prime Recamán's Sequence Sexy Prime Squarefree Year

Historical context — 677 AD

Calendar year

Year 677 (DCLXXVII) was a common year starting on Thursday of the Julian calendar.

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Historical context — 677 BC

Calendar year

The year 677 BC, also known as 677 BCE, was a year of the pre-Julian Roman calendar.

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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: Monday
January 1, 677
Ended on: Monday
December 31, 677
Friday the 13ths: 2
2 Friday the 13ths this year.
Decade: 670s
670–679
Century: 7th century
601–700
Millennium: 1st millennium
1–1000
Years ago: 1,349
1349 years before 2026.

In other calendars

Hebrew: 4437 / 4438 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 57 / 58 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Fire zodiac:Ox
Sexagenary cycle position 14 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1220 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 55 / 56 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 669 / 670 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 599 / 598 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 3
Digit sum: 20
Digit product: 294
Digital root: 2
Palindrome: No
Bit width: 10 bits
Reversed: 776
Recamán's sequence: a(2,270) = 677
Square (n²): 458,329
Cube (n³): 310,288,733
Divisor count: 2
σ(n) — sum of divisors: 678
φ(n) — Euler's totient: 676

Primality

677 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)

1 · 677

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 677)

1 × 677

First multiples

677 · 1,354 (double) · 2,031 · 2,708 · 3,385 · 4,062 · 4,739 · 5,416 · 6,093 · 6,770

Sums & aliquot sequence

As a sum of two squares: 1² + 26²

As consecutive integers: 338 + 339

Representations

In words: six hundred seventy-seven
Ordinal: 677th
Roman numeral: DCLXXVII
Binary: 1010100101
Octal: 1245
Hexadecimal: 0x2A5
Base64: AqU=
One's complement: 64,858 (16-bit)

In other bases

ternary (3) 221002

quaternary (4) 22211

quinary (5) 10202

senary (6) 3045

septenary (7) 1655

nonary (9) 832

undecimal (11) 566

duodecimal (12) 485

tridecimal (13) 401

tetradecimal (14) 365

pentadecimal (15) 302

Historical numeral systems

Babylonian (base 60): 𒌋𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): χοζʹ
Mayan (base 20): 𝋡·𝋭·𝋱
Chinese: 六百七十七
Chinese (financial): 陸佰柒拾柒

In other modern scripts

Eastern Arabic ٦٧٧ Devanagari ६७७ Bengali ৬৭৭ Tamil ௬௭௭ Thai ๖๗๗ Tibetan ༦༧༧ Khmer ៦៧៧ Lao ໖໗໗ Burmese ၆၇၇

Digit at this position in famous constants

π — Pi (π): Digit 677 = 5
e — Euler's number (e): Digit 677 = 3
φ — Golden ratio (φ): Digit 677 = 6
√2 — Pythagoras's (√2): Digit 677 = 0
ln 2 — Natural log of 2: Digit 677 = 5
γ — Euler-Mascheroni (γ): Digit 677 = 1

Also seen as

Prime neighborhood

Adjacent primes:

Previous prime: 673 (gap of 4)
Next prime: 683 (gap of 6)

Pair status: cousin with 673, sexy with 683.

Unicode codepoint

Latin Small Letter Dz Digraph With Curl

U+02A5

Lowercase letter (Ll)

UTF-8 encoding: CA A5 (2 bytes).

Lookup U+02A5 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0002A5

RGB(0, 2, 165)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.165.

Address: 0.0.2.165
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.2.165

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