Properties of the Number -663

Six Hundred Sixty-Three

Basics

Value: -664 → -663 → -662

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 13 × 17

Divisors: 1, 3, 13, 17, 39, 51, 221, 663

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1010010111

Octal: -1227

Duodecimal: -473

Hexadecimal: -297

Square: 439569

Square Root: 25.748786379167466

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Values of n such that L(9) and N(9) are both prime, where L(k) = (n²+n+1)*2^2·k + (2·n+1)*2^k + 1, N(k) = (n²+n+1)*2^k + n. A226929

Expansion of ∏_m>=1 ((1+q^2·m-1)/(1+q^2·m))⁶. A29843

Expansion of 1/(2 - ∏_k>=1 (1 - x^k)). A307059

1-gonal pyramidal numbers. A254749

Numerators of coefficients in expansion of (1 + x)^3/4. A364661

G.f. A(x) equals series_reversion(x·F(x))/x where F(x) is the g.f. of A120952; a(2·n) = 0 for n>=1. A120954

a(n) = A369134(n, n). A369121

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 165", based on the 5-celled von Neumann neighborhood. A270460

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 189", based on the 5-celled von Neumann neighborhood. A270680

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 267", based on the 5-celled von Neumann neighborhood. A271086