1,658
1,658 is a composite number, even, a calendar year.
Notable events — 1658 AD
- Sep 3 Oliver Cromwell dies in London.
- Jun 14 Anglo-French forces defeat Spain at the Dunes near Dunkirk.
- Feb 26 The Treaty of Roskilde transfers territories from Denmark to Sweden.
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
-
Tuesday
January 1, 1658
- Ended on
-
Tuesday
December 31, 1658
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Easter Sunday
-
April 21
Sunday, April 21, 1658
- Decade
-
1650s
1650–1659
- Century
-
17th century
1601–1700
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
368
368 years before 2026.
In other calendars
- Hebrew
-
5418 / 5419 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
1068 / 1069 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Dog
Sexagenary cycle position 35 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2201 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
1036 / 1037 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1650 / 1651 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1580 / 1579 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 20
- Digit product
- 240
- Digital root
- 2
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 8,561
- Recamán's sequence
- a(784) = 1,658
- Square (n²)
- 2,748,964
- Cube (n³)
- 4,557,782,312
- Divisor count
- 4
- σ(n) — sum of divisors
- 2,490
- φ(n) — Euler's totient
- 828
- Sum of prime factors
- 831
Primality
Prime factorization: 2 × 829
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand six hundred fifty-eight
- Ordinal
- 1658th
- Roman numeral
- MDCLVIII
- Binary
- 11001111010
- Octal
- 3172
- Hexadecimal
- 0x67A
- Base64
- Bno=
- One's complement
- 63,877 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αχνηʹ
- Mayan (base 20)
- 𝋤·𝋢·𝋲
- Chinese
- 一千六百五十八
- Chinese (financial)
- 壹仟陸佰伍拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,658 = 1
- e — Euler's number (e)
- Digit 1,658 = 8
- φ — Golden ratio (φ)
- Digit 1,658 = 2
- √2 — Pythagoras's (√2)
- Digit 1,658 = 2
- ln 2 — Natural log of 2
- Digit 1,658 = 2
- γ — Euler-Mascheroni (γ)
- Digit 1,658 = 0
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1658, here are decompositions:
- 31 + 1627 = 1658
- 37 + 1621 = 1658
- 61 + 1597 = 1658
- 79 + 1579 = 1658
- 109 + 1549 = 1658
- 127 + 1531 = 1658
- 199 + 1459 = 1658
- 211 + 1447 = 1658
Showing the first eight; more decompositions exist.
UTF-8 encoding: D9 BA (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.6.122.
- Address
- 0.0.6.122
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.6.122
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1658 first appears in π at position 5,777 of the decimal expansion (the 5,777ordinal-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.