Number

1,655

1,655 is a composite number, odd, a calendar year.

Arithmetic Number Deficient Number Evil Number Recamán's Sequence Semiprime Squarefree Year

Notable events — 1655 AD

May 11 England captures Jamaica from Spain.
Aug 7 Swedish forces invade Poland-Lithuania, beginning the Deluge.
Apr 16 Cromwell launches the Western Design against Spanish America.

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: Friday
January 1, 1655
Ended on: Friday
December 31, 1655
Friday the 13ths: 1
One Friday the 13th this year.
Easter Sunday: March 28
Sunday, March 28, 1655
Decade: 1650s
1650–1659
Century: 17th century
1601–1700
Millennium: 2nd millennium
1001–2000
Years ago: 371
371 years before 2026.

In other calendars

Hebrew: 5415 / 5416 AM
Rosh Hashanah falls in September/October.
Islamic Hijri: 1065 / 1066 AH
Lunar calendar; year spans differ from Gregorian.
Chinese: Year of the zodiac:Wood zodiac:Goat
Sexagenary cycle position 32 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 2198 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Persian Solar Hijri: 1033 / 1034 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
Ethiopian: 1647 / 1648 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 1577 / 1576 Saka
Indian national calendar; year starts in March.

Properties

Parity: Odd
Digit count: 4
Digit sum: 17
Digit product: 150
Digital root: 8
Palindrome: No
Bit width: 11 bits
Reversed: 5,561
Recamán's sequence: a(778) = 1,655
Square (n²): 2,739,025
Cube (n³): 4,533,086,375
Divisor count: 4
σ(n) — sum of divisors: 1,992
φ(n) — Euler's totient: 1,320
Sum of prime factors: 336

Primality

Prime factorization: 5 × 331

Nearest primes: 1,637 (−18) · 1,657 (+2)

Divisors & multiples

All divisors (4)

1 · 5 · 331 · 1655

Aliquot sum (sum of proper divisors): 337

Factor pairs (a × b = 1,655)

1 × 1655

5 × 331

First multiples

1,655 · 3,310 (double) · 4,965 · 6,620 · 8,275 · 9,930 · 11,585 · 13,240 · 14,895 · 16,550

Sums & aliquot sequence

As consecutive integers: 827 + 828 329 + 330 + 331 + 332 + 333 161 + 162 + … + 170

Aliquot sequence: 1,655 → 337 → 1 → 0 — terminates at zero

Representations

In words: one thousand six hundred fifty-five
Ordinal: 1655th
Roman numeral: MDCLV
Binary: 11001110111
Octal: 3167
Hexadecimal: 0x677
Base64: Bnc=
One's complement: 63,880 (16-bit)

In other bases

ternary (3) 2021022

quaternary (4) 121313

quinary (5) 23110

senary (6) 11355

septenary (7) 4553

nonary (9) 2238

undecimal (11) 1275

duodecimal (12) b5b

tridecimal (13) 9a4

tetradecimal (14) 863

pentadecimal (15) 755

Historical numeral systems

Babylonian (base 60): 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹
Egyptian hieroglyphic: 𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺
Greek (Milesian): ͵αχνεʹ
Mayan (base 20): 𝋤·𝋢·𝋯
Chinese: 一千六百五十五
Chinese (financial): 壹仟陸佰伍拾伍

In other modern scripts

Eastern Arabic ١٦٥٥ Devanagari १६५५ Bengali ১৬৫৫ Tamil ௧௬௫௫ Thai ๑๖๕๕ Tibetan ༡༦༥༥ Khmer ១៦៥៥ Lao ໑໖໕໕ Burmese ၁၆၅၅

Digit at this position in famous constants

π — Pi (π): Digit 1,655 = 3
e — Euler's number (e): Digit 1,655 = 8
φ — Golden ratio (φ): Digit 1,655 = 9
√2 — Pythagoras's (√2): Digit 1,655 = 9
ln 2 — Natural log of 2: Digit 1,655 = 5
γ — Euler-Mascheroni (γ): Digit 1,655 = 6

Also seen as

Unicode codepoint

Arabic Letter U With Hamza Above

U+0677

Other letter (Lo)

UTF-8 encoding: D9 B7 (2 bytes).

Lookup U+0677 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#000677

RGB(0, 6, 119)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.6.119.

Address: 0.0.6.119
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.6.119

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

Position in π

The digit sequence 1655 first appears in π at position 6,903 of the decimal expansion (the 6,903ordinal-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.

Look up 1655 on Pi Search ↗