166,442
166,442 is a composite number, even.
166,442 (one hundred sixty-six thousand four hundred forty-two) is an even 6-digit number. It is a composite number with 4 divisors, and factors as 2 × 83,221. Written other ways, in hexadecimal, 0x28A2A.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 23
- Digit product
- 1,152
- Digital root
- 5
- Palindrome
- No
- Bit width
- 18 bits
- Reversed
- 244,661
- Square (n²)
- 27,702,939,364
- Cube (n³)
- 4,610,932,633,622,888
- Divisor count
- 4
- σ(n) — sum of divisors
- 249,666
- φ(n) — Euler's totient
- 83,220
- Sum of prime factors
- 83,223
Primality
Prime factorization: 2 × 83221
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√166,442 = [407; (1, 36, 11, 6, 1, 1, 1, 7, 3, 1, 2, 6, 1, 6, 19, 1, 3, 11, 4, 5, 2, 5, 1, 30, …)]
Representations
- In words
- one hundred sixty-six thousand four hundred forty-two
- Ordinal
- 166442nd
- Binary
- 101000101000101010
- Octal
- 505052
- Hexadecimal
- 0x28A2A
- Base64
- Aooq
- One's complement
- 4,294,800,853 (32-bit)
- Scientific notation
- 1.66442 × 10⁵
- As a duration
- 166,442 s = 1 day, 22 hours, 14 minutes, 2 seconds
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒁹𒁹𒁹𒁹 𒁹𒁹
- Egyptian hieroglyphic
- 𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓏺𓏺
- Greek (Milesian)
- ͵ρξϛυμβʹ
- Chinese
- 一十六萬六千四百四十二
- Chinese (financial)
- 壹拾陸萬陸仟肆佰肆拾貳
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 166442, here are decompositions:
- 13 + 166429 = 166442
- 43 + 166399 = 166442
- 79 + 166363 = 166442
- 139 + 166303 = 166442
- 223 + 166219 = 166442
- 379 + 166063 = 166442
- 421 + 166021 = 166442
- 541 + 165901 = 166442
Showing the first eight; more decompositions exist.
UTF-8 encoding: F0 A8 A8 AA (4 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.2.138.42.
- Address
- 0.2.138.42
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.2.138.42
Unspecified address (0.0.0.0/8) — "this network" placeholder.
This number falls in the range of US utility patent numbers. If it's a patent, it would be issued as US 166,442 and was likely granted around 1874.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
The digit sequence 166442 first appears in π at position 13,941 of the decimal expansion (the 13,941ordinal-suffix:st 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°.