Number

676

676 is a composite number, even, a calendar year.

Consecutive Digits Deficient Number Evil Number Palindrome Perfect Square Powerful Number Recamán's Sequence Year

Historical context — 676 AD

Calendar year

Year 676 (DCLXXVI) was a leap year starting on Tuesday of the Julian calendar.

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Historical context — 676 BC

Calendar year

The year 676 BC was a year of the pre-Julian Roman calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →

Year facts

Year type: Leap year
Divisible by 4 and not by 100; February has 29 days.
Days in year: 366
ISO weeks: 52
Started on: Saturday
January 1, 676
Ended on: Sunday
December 31, 676
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 670s
670–679
Century: 7th century
601–700
Millennium: 1st millennium
1–1000
Years ago: 1,350
1350 years before 2026.

In other calendars

Hebrew: 4436 / 4437 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 56 / 57 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Fire zodiac:Rat
Sexagenary cycle position 13 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 1219 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 54 / 55 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 668 / 669 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 598 / 597 Saka
Indian national calendar; year starts in March.

Properties

Parity: Even
Digit count: 3
Digit sum: 19
Digit product: 252
Digital root: 1
Palindrome: Yes
Bit width: 10 bits
Recamán's sequence: a(2,272) = 676
Square (n²): 456,976
Cube (n³): 308,915,776
Square root (√n): 26
Divisor count: 9
σ(n) — sum of divisors: 1,281
φ(n) — Euler's totient: 312
Sum of prime factors: 30

Primality

Prime factorization: 2 ² × 13 ²

Nearest primes: 673 (−3) · 677 (+1)

Divisors & multiples

All divisors (9)

1 · 2 · 4 · 13 · 26 · 52 · 169 · 338 (half) · 676

Aliquot sum (sum of proper divisors): 605

Factor pairs (a × b = 676)

1 × 676

2 × 338

4 × 169

13 × 52

26 × 26

First multiples

676 · 1,352 (double) · 2,028 · 2,704 · 3,380 · 4,056 · 4,732 · 5,408 · 6,084 · 6,760

Sums & aliquot sequence

As a sum of two squares: 0² + 26² = 10² + 24²

As consecutive integers: 81 + 82 + … + 88 46 + 47 + … + 58

Aliquot sequence: 676 → 605 → 193 → 1 → 0 — terminates at zero

Representations

In words: six hundred seventy-six
Ordinal: 676th
Roman numeral: DCLXXVI
Binary: 1010100100
Octal: 1244
Hexadecimal: 0x2A4
Base64: AqQ=
One's complement: 64,859 (16-bit)

In other bases

ternary (3) 221001

quaternary (4) 22210

quinary (5) 10201

senary (6) 3044

septenary (7) 1654

nonary (9) 831

undecimal (11) 565

duodecimal (12) 484

tridecimal (13) 400

tetradecimal (14) 364

pentadecimal (15) 301

Historical numeral systems

Babylonian (base 60): 𒌋𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): χοϛʹ
Mayan (base 20): 𝋡·𝋭·𝋰
Chinese: 六百七十六
Chinese (financial): 陸佰柒拾陸

In other modern scripts

Eastern Arabic ٦٧٦ Devanagari ६७६ Bengali ৬৭৬ Tamil ௬௭௬ Thai ๖๗๖ Tibetan ༦༧༦ Khmer ៦៧៦ Lao ໖໗໖ Burmese ၆၇၆

Digit at this position in famous constants

π — Pi (π): Digit 676 = 9
e — Euler's number (e): Digit 676 = 5
φ — Golden ratio (φ): Digit 676 = 1
√2 — Pythagoras's (√2): Digit 676 = 3
ln 2 — Natural log of 2: Digit 676 = 2
γ — Euler-Mascheroni (γ): Digit 676 = 5

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 676, here are decompositions:

3 + 673 = 676
17 + 659 = 676
23 + 653 = 676
29 + 647 = 676
59 + 617 = 676
83 + 593 = 676
89 + 587 = 676
107 + 569 = 676

Showing the first eight; more decompositions exist.

Unicode codepoint

Latin Small Letter Dezh Digraph

U+02A4

Lowercase letter (Ll)

UTF-8 encoding: CA A4 (2 bytes).

Lookup U+02A4 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0002A4

RGB(0, 2, 164)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.164.

Address: 0.0.2.164
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.2.164

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