6,990
6,990 is a composite number, even.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 24
- Digit product
- 0
- Digital root
- 6
- Palindrome
- No
- Bit width
- 13 bits
- Reversed
- 996
- Flips to (rotate 180°)
- 669
- Recamán's sequence
- a(177,031) = 6,990
- Square (n²)
- 48,860,100
- Cube (n³)
- 341,532,099,000
- Divisor count
- 16
- σ(n) — sum of divisors
- 16,848
- φ(n) — Euler's totient
- 1,856
- Sum of prime factors
- 243
Primality
Prime factorization: 2 × 3 × 5 × 233
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- six thousand nine hundred ninety
- Ordinal
- 6990th
- Binary
- 1101101001110
- Octal
- 15516
- Hexadecimal
- 0x1B4E
- Base64
- G04=
- One's complement
- 58,545 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒁹 𒌋𒌋𒌋𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒌋𒌋𒌋
- Egyptian hieroglyphic
- 𓆼𓆼𓆼𓆼𓆼𓆼𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆𓎆
- Greek (Milesian)
- ͵ϛϡϟʹ
- Mayan (base 20)
- 𝋱·𝋩·𝋪
- Chinese
- 六千九百九十
- Chinese (financial)
- 陸仟玖佰玖拾
Digit at this position in famous constants
- π — Pi (π)
- Digit 6,990 = 0
- e — Euler's number (e)
- Digit 6,990 = 8
- φ — Golden ratio (φ)
- Digit 6,990 = 9
- √2 — Pythagoras's (√2)
- Digit 6,990 = 3
- ln 2 — Natural log of 2
- Digit 6,990 = 2
- γ — Euler-Mascheroni (γ)
- Digit 6,990 = 4
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 6990, here are decompositions:
- 7 + 6983 = 6990
- 13 + 6977 = 6990
- 19 + 6971 = 6990
- 23 + 6967 = 6990
- 29 + 6961 = 6990
- 31 + 6959 = 6990
- 41 + 6949 = 6990
- 43 + 6947 = 6990
Showing the first eight; more decompositions exist.
UTF-8 encoding: E1 AD 8E (3 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.27.78.
- Address
- 0.0.27.78
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.27.78
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 6990 first appears in π at position 2,070 of the decimal expansion (the 2,070ordinal-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.