1,366
1,366 is a composite number, even, a calendar year.
1,366 (one thousand three hundred sixty-six) is an even 4-digit number. It is a composite number with 4 divisors, and factors as 2 × 683. Written other ways, in Roman numerals it is MCCCLXVI and in binary, 10101010110.
Interestingness
Historical context — 1366 AD
Calendar year
Year 1366 (MCCCLXVI) was a common year starting on Thursday of the Julian 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
-
Wednesday
January 1, 1366
- Ended on
-
Wednesday
December 31, 1366
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
1360s
1360–1369
- Century
-
14th century
1301–1400
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
660
660 years before 2026.
In other calendars
- Hebrew
-
5126 / 5127 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
767 / 768 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Fire zodiac:Horse
Sexagenary cycle position 43 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
1909 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
744 / 745 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1358 / 1359 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1288 / 1287 Saka
Indian national calendar; year starts in March.
Properties
Primality
Prime factorization: 2 × 683
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√1,366 = [36; (1, 23, 1, 1, 1, 7, 1, 1, 4, 2, 1, 1, 14, 5, 4, 1, 2, 1, 2, 2, 10, 7, 3, 2, …)]
Representations
- In words
- one thousand three hundred sixty-six
- Ordinal
- 1366th
- Roman numeral
- MCCCLXVI
- Binary
- 10101010110
- Octal
- 2526
- Hexadecimal
- 0x556
- Base64
- BVY=
- One's complement
- 64,169 (16-bit)
- Scientific notation
- 1.366 × 10³
- As a duration
- 1,366 s = 22 minutes, 46 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ατξϛʹ
- Mayan (base 20)
- 𝋣·𝋨·𝋦
- Chinese
- 一千三百六十六
- Chinese (financial)
- 壹仟參佰陸拾陸
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,366 = 7
- e — Euler's number (e)
- Digit 1,366 = 6
- φ — Golden ratio (φ)
- Digit 1,366 = 1
- √2 — Pythagoras's (√2)
- Digit 1,366 = 1
- ln 2 — Natural log of 2
- Digit 1,366 = 5
- γ — Euler-Mascheroni (γ)
- Digit 1,366 = 6
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1366, here are decompositions:
- 5 + 1361 = 1366
- 47 + 1319 = 1366
- 59 + 1307 = 1366
- 83 + 1283 = 1366
- 89 + 1277 = 1366
- 107 + 1259 = 1366
- 137 + 1229 = 1366
- 149 + 1217 = 1366
Showing the first eight; more decompositions exist.
UTF-8 encoding: D5 96 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.86.
- Address
- 0.0.5.86
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.5.86
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 1,366 Hz is closest to:
- Concert pitch (A4 = 440 Hz): F6 (1396.9 Hz, -39¢)
- Scientific pitch (C4 = 256 Hz): F6 (1366.9 Hz, -1¢)
- Baroque pitch (A4 = 415 Hz): F♯6 (1395.9 Hz, -37¢)
The digit sequence 1366 first appears in π at position 16,723 of the decimal expansion (the 16,723ordinal-suffix:rd digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.