1,566
1,566 is a composite number, even, a calendar year.
Notable events — 1566 AD
- Aug 19 The Beeldenstorm Calvinist iconoclasm spreads across the Low Countries.
- Mar 9 David Rizzio is murdered in front of Mary Queen of Scots.
- Sep 5 Suleiman the Magnificent dies during the siege of Szigetvár.
Events compiled from Wikipedia ↗ · Licensed CC BY-SA 4.0
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
-
Saturday
January 1, 1566
- Ended on
-
Saturday
December 31, 1566
- Friday the 13ths
-
1
One Friday the 13th this year.
- Decade
-
1560s
1560–1569
- Century
-
16th century
1501–1600
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
460
460 years before 2026.
In other calendars
- Hebrew
-
5326 / 5327 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
973 / 974 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Fire zodiac:Tiger
Sexagenary cycle position 3 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2109 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
944 / 945 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1558 / 1559 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1488 / 1487 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 18
- Digit product
- 180
- Digital root
- 9
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 6,651
- Recamán's sequence
- a(1,428) = 1,566
- Square (n²)
- 2,452,356
- Cube (n³)
- 3,840,389,496
- Divisor count
- 16
- σ(n) — sum of divisors
- 3,600
- φ(n) — Euler's totient
- 504
- Sum of prime factors
- 40
Primality
Prime factorization: 2 × 3 3 × 29
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand five hundred sixty-six
- Ordinal
- 1566th
- Roman numeral
- MDLXVI
- Binary
- 11000011110
- Octal
- 3036
- Hexadecimal
- 0x61E
- Base64
- Bh4=
- One's complement
- 63,969 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αφξϛʹ
- Mayan (base 20)
- 𝋣·𝋲·𝋦
- Chinese
- 一千五百六十六
- Chinese (financial)
- 壹仟伍佰陸拾陸
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,566 = 2
- e — Euler's number (e)
- Digit 1,566 = 5
- φ — Golden ratio (φ)
- Digit 1,566 = 2
- √2 — Pythagoras's (√2)
- Digit 1,566 = 6
- ln 2 — Natural log of 2
- Digit 1,566 = 0
- γ — Euler-Mascheroni (γ)
- Digit 1,566 = 5
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1566, here are decompositions:
- 7 + 1559 = 1566
- 13 + 1553 = 1566
- 17 + 1549 = 1566
- 23 + 1543 = 1566
- 43 + 1523 = 1566
- 67 + 1499 = 1566
- 73 + 1493 = 1566
- 79 + 1487 = 1566
Showing the first eight; more decompositions exist.
UTF-8 encoding: D8 9E (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.6.30.
- Address
- 0.0.6.30
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.6.30
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1566 first appears in π at position 4,828 of the decimal expansion (the 4,828ordinal-suffix:th 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.