Properties of the Number -1666

Six Hundred Sixty-Six

Basics

Value: -1667 → -1666 → -1665

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 7 ² × 17

Divisors: 1, 2, 7, 14, 17, 34, 49, 98, 119, 238

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: -11010000010

Octal: -3202

Duodecimal: -B6A

Hexadecimal: -682

Square: 2775556

Square Root: 40.8166632639171

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

Expansion of ∏_k>=1 (1 - q^k)⁸/(1 - q^7·k) in powers of q. A282942

Expansion of e.g.f. exp( -(exp(x) - 1)⁴ / 24 ). A354397

Expansion of 1 / ∑_k>=0 x^{k*(5·k - 3}/2). A363149

Numerator of Hermite(n, 2/29). A160225

Numerator of Hermite(n, 8/31). A160306

E.g.f.: tan(log(1+tan(x))). A9639

Coordination sequence for "tsi" 3D uniform tiling. A299289

Generalized 13-gonal numbers: m*(11·m-9)/2 with m = 0, 1, -1, 2, -2, 3, -3, ... A195313

Integers of the form m*(m + 7)/8. A274979

Table a(d,m) of number of points of L1 norm m in cubic lattice Z^d, read by antidiagonals (d >= 1, m >= 0). A35607