6,664
6,664 is a composite number, even.
6,664 (six thousand six hundred sixty-four) is an even 4-digit number. It is a composite number with 24 divisors, and factors as 2³ × 7² × 17. Its proper divisors sum to 8,726, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x1A08.
Interestingness
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 22
- Digit product
- 864
- Digital root
- 4
- Palindrome
- No
- Bit width
- 13 bits
- Reversed
- 4,666
- Recamán's sequence
- a(11,879) = 6,664
- Square (n²)
- 44,408,896
- Cube (n³)
- 295,940,882,944
- Divisor count
- 24
- σ(n) — sum of divisors
- 15,390
- φ(n) — Euler's totient
- 2,688
- Sum of prime factors
- 37
Primality
Prime factorization: 2 3 × 7 2 × 17
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√6,664 = [81; (1, 1, 1, 2, 1, 1, 1, 162)]
Period length 8 — the block in parentheses repeats forever.
Representations
- In words
- six thousand six hundred sixty-four
- Ordinal
- 6664th
- Binary
- 1101000001000
- Octal
- 15010
- Hexadecimal
- 0x1A08
- Base64
- Ggg=
- One's complement
- 58,871 (16-bit)
- Scientific notation
- 6.664 × 10³
- As a duration
- 6,664 s = 1 hour, 51 minutes, 4 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹 𒌋𒌋𒌋𒌋𒌋𒁹 𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ϛχξδʹ
- Mayan (base 20)
- 𝋰·𝋭·𝋤
- Chinese
- 六千六百六十四
- Chinese (financial)
- 陸仟陸佰陸拾肆
Digit at this position in famous constants
- π — Pi (π)
- Digit 6,664 = 3
- e — Euler's number (e)
- Digit 6,664 = 5
- φ — Golden ratio (φ)
- Digit 6,664 = 9
- √2 — Pythagoras's (√2)
- Digit 6,664 = 1
- ln 2 — Natural log of 2
- Digit 6,664 = 7
- γ — Euler-Mascheroni (γ)
- Digit 6,664 = 9
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 6664, here are decompositions:
- 3 + 6661 = 6664
- 5 + 6659 = 6664
- 11 + 6653 = 6664
- 83 + 6581 = 6664
- 101 + 6563 = 6664
- 113 + 6551 = 6664
- 173 + 6491 = 6664
- 191 + 6473 = 6664
Showing the first eight; more decompositions exist.
UTF-8 encoding: E1 A8 88 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.26.8.
- Address
- 0.0.26.8
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.26.8
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 6,664 Hz is closest to:
- Concert pitch (A4 = 440 Hz): G♯8 (6644.9 Hz, +5¢)
- Scientific pitch (C4 = 256 Hz): G♯8 (6502 Hz, +43¢)
- Baroque pitch (A4 = 415 Hz): A8 (6640 Hz, +6¢)
The digit sequence 6664 first appears in π at position 4,435 of the decimal expansion (the 4,435ordinal-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.
Related reading
- Egyptian hieroglyphic numerals — Seven hieroglyphs for every power of ten, from a single stroke to a million.