990,660
990,660 is a composite number, even.
990,660 (nine hundred ninety thousand six hundred sixty) is an even 6-digit number. It is a composite number with 96 divisors, and factors as 2² × 3 × 5 × 11 × 19 × 79. Its proper divisors sum to 2,234,940, more than the number itself, making it an abundant number. Written other ways, in hexadecimal, 0xF1DC4.
Interestingness
Properties
- Parity
- Even
- Digit count
- 6
- Digit sum
- 30
- Digit product
- 0
- Digital root
- 3
- Palindrome
- No
- Bit width
- 20 bits
- Reversed
- 66,099
- Flips to (rotate 180°)
- 99,066
- Square (n²)
- 981,407,235,600
- Cube (n³)
- 972,240,892,019,496,000
- Divisor count
- 96
- σ(n) — sum of divisors
- 3,225,600
- φ(n) — Euler's totient
- 224,640
- Sum of prime factors
- 121
Primality
Prime factorization: 2 2 × 3 × 5 × 11 × 19 × 79
Divisors & multiples
Sums & aliquot sequence
Continued fraction of √n
√990,660 = [995; (3, 7, 2, 3, 1, 6, 8, 1, 16, 3, 1, 2, 2, 1, 1, 1, 11, 1, 1, 30, 1, 1, 2, 1, …)]
Period length 46 — the block in parentheses repeats forever.
Representations
- In words
- nine hundred ninety thousand six hundred sixty
- Ordinal
- 990660th
- Binary
- 11110001110111000100
- Octal
- 3616704
- Hexadecimal
- 0xF1DC4
- Base64
- Dx3E
- One's complement
- 4,293,976,635 (32-bit)
- Scientific notation
- 9.9066 × 10⁵
- As a duration
- 990,660 s = 11 days, 11 hours, 11 minutes
As an angle
Historical numeral systems
- Babylonian (base 60)
- 𒁹𒁹𒁹𒁹 𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹 𒌋𒁹 ·
- Egyptian hieroglyphic
- 𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓆐𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓂍𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ϡϟχξʹ
- Chinese
- 九十九萬零六百六十
- Chinese (financial)
- 玖拾玖萬零陸佰陸拾
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 990660, here are decompositions:
- 17 + 990643 = 990660
- 23 + 990637 = 990660
- 29 + 990631 = 990660
- 61 + 990599 = 990660
- 67 + 990593 = 990660
- 71 + 990589 = 990660
- 101 + 990559 = 990660
- 113 + 990547 = 990660
Showing the first eight; more decompositions exist.
As an unsigned 32-bit integer, this is the IPv4 address 0.15.29.196.
- Address
- 0.15.29.196
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.15.29.196
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 990,660 and was likely granted around 1911.
Patent numbers below 100,000 are excluded as too ambiguous; modern numbering currently reaches roughly 12.5 million.
Related reading
- Babylonian numerals — The base-60 cuneiform system that gave us 60 minutes, 60 seconds, and 360°.