662
662 is a composite number, even, a calendar year.
662 (six hundred sixty-two) is an even 3-digit number. It is a composite number with 4 divisors, and factors as 2 × 331. Written other ways, in Roman numerals it is DCLXII and in binary, 1010010110.
Interestingness
Historical context — 662 AD
Calendar year
Year 662 (DCLXII) was a common year starting on Saturday of the Julian calendar.
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Historical context — 662 BC
Decade
This article concerns the period 669 BC – 660 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, 662
- Ended on
-
Wednesday
December 31, 662
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
660s
660–669
- Century
-
7th century
601–700
- Millennium
-
1st millennium
1–1000
- Years ago
-
1,364
1364 years before 2026.
In other calendars
- Hebrew
-
4422 / 4423 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
41 / 42 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Water zodiac:Dog
Sexagenary cycle position 59 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1205 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
40 / 41 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
654 / 655 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
584 / 583 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 2 × 331
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√662 = [25; (1, 2, 1, 2, 3, 1, 1, 2, 6, 1, 24, 1, 6, 2, 1, 1, 3, 2, 1, 2, 1, 50)]
Period length 22 — the block in parentheses repeats forever.
Representations
- In words
- six hundred sixty-two
- Ordinal
- 662nd
- Roman numeral
- DCLXII
- Binary
- 1010010110
- Octal
- 1226
- Hexadecimal
- 0x296
- Base64
- ApY=
- One's complement
- 64,873 (16-bit)
- Scientific notation
- 6.62 × 10²
- As a duration
- 662 s = 11 minutes, 2 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒁹 𒁹𒁹
- Egyptian hieroglyphic
- 𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- χξβʹ
- Mayan (base 20)
- 𝋡·𝋭·𝋢
- Chinese
- 六百六十二
- Chinese (financial)
- 陸佰陸拾貳
Digit at this position in famous constants
- π — Pi (π)
- Digit 662 = 2
- e — Euler's number (e)
- Digit 662 = 7
- φ — Golden ratio (φ)
- Digit 662 = 3
- √2 — Pythagoras's (√2)
- Digit 662 = 8
- ln 2 — Natural log of 2
- Digit 662 = 6
- γ — Euler-Mascheroni (γ)
- Digit 662 = 6
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 662, here are decompositions:
- 3 + 659 = 662
- 19 + 643 = 662
- 31 + 631 = 662
- 43 + 619 = 662
- 61 + 601 = 662
- 139 + 523 = 662
- 163 + 499 = 662
- 199 + 463 = 662
Showing the first eight; more decompositions exist.
UTF-8 encoding: CA 96 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.150.
- Address
- 0.0.2.150
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.2.150
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The number 662 is an active NANP area code (North American Numbering Plan).
- Primary area
- Tupelo / Oxford
- Region
- Mississippi
- 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, 662 Hz is closest to:
- Concert pitch (A4 = 440 Hz): E5 (659.3 Hz, +7¢)
- Scientific pitch (C4 = 256 Hz): E5 (645.1 Hz, +45¢ — about midway to F5)
- Baroque pitch (A4 = 415 Hz): F5 (658.8 Hz, +8¢)
Related reading
- Mayan numerals — Vigesimal dots-and-bars with a shell zero — one of the earliest true zeros.