8,166
8,166 is a composite number, even.
8,166 (eight thousand one hundred sixty-six) is an even 4-digit number. It is a composite number with 8 divisors, and factors as 2 × 3 × 1,361. Its proper divisors sum to 8,178, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0x1FE6.
Interestingness
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 21
- Digit product
- 288
- Digital root
- 3
- Palindrome
- No
- Bit width
- 13 bits
- Reversed
- 6,618
- Flips to (rotate 180°)
- 9,918
- Recamán's sequence
- a(10,435) = 8,166
- Square (n²)
- 66,683,556
- Cube (n³)
- 544,537,918,296
- Divisor count
- 8
- σ(n) — sum of divisors
- 16,344
- φ(n) — Euler's totient
- 2,720
- Sum of prime factors
- 1,366
Primality
Prime factorization: 2 × 3 × 1361
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√8,166 = [90; (2, 1, 2, 1, 2, 1, 7, 1, 6, 1, 35, 3, 1, 1, 1, 17, 2, 3, 2, 3, 1, 6, 2, 5, …)]
Period length 50 — the block in parentheses repeats forever.
Representations
- In words
- eight thousand one hundred sixty-six
- Ordinal
- 8166th
- Binary
- 1111111100110
- Octal
- 17746
- Hexadecimal
- 0x1FE6
- Base64
- H+Y=
- One's complement
- 57,369 (16-bit)
- Scientific notation
- 8.166 × 10³
- As a duration
- 8,166 s = 2 hours, 16 minutes, 6 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹 𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵ηρξϛʹ
- Mayan (base 20)
- 𝋡·𝋠·𝋨·𝋦
- Chinese
- 八千一百六十六
- Chinese (financial)
- 捌仟壹佰陸拾陸
Digit at this position in famous constants
- π — Pi (π)
- Digit 8,166 = 6
- e — Euler's number (e)
- Digit 8,166 = 3
- φ — Golden ratio (φ)
- Digit 8,166 = 4
- √2 — Pythagoras's (√2)
- Digit 8,166 = 7
- ln 2 — Natural log of 2
- Digit 8,166 = 1
- γ — Euler-Mascheroni (γ)
- Digit 8,166 = 2
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 8166, here are decompositions:
- 5 + 8161 = 8166
- 19 + 8147 = 8166
- 43 + 8123 = 8166
- 73 + 8093 = 8166
- 79 + 8087 = 8166
- 97 + 8069 = 8166
- 107 + 8059 = 8166
- 113 + 8053 = 8166
Showing the first eight; more decompositions exist.
UTF-8 encoding: E1 BF A6 (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.31.230.
- Address
- 0.0.31.230
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.31.230
Unspecified address (0.0.0.0/8) — "this network" placeholder.
Heard as a frequency, 8,166 Hz is closest to:
- Concert pitch (A4 = 440 Hz): C9 (8372 Hz, -43¢)
- Scientific pitch (C4 = 256 Hz): C9 (8192 Hz, -6¢)
- Baroque pitch (A4 = 415 Hz): C♯9 (8365.9 Hz, -42¢)
The digit sequence 8166 first appears in π at position 23,503 of the decimal expansion (the 23,503ordinal-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
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.