Properties of the Number 71666

Seventy-One Thousand Six Hundred Sixty-Six

Basics

Value: 71665 → 71666 → 71667

Parity: even

Prime: No

Previous Prime: 71663

Next Prime: 71671

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 × 7 × 5119

Divisors: 1, 2, 7, 14, 5119, 10238, 35833, 71666

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 10001011111110010

Octal: 213762

Duodecimal: 35582

Hexadecimal: 117f2

Square: 5136015556

Square Root: 267.7050615883084

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

Triangle T(n,k), n>=1, read by rows, where T(n,k) is the number of lattice polygons with area n and perimeter 2·k. A8855

Number of n-celled polygons with perimeter 2n+2 on square lattice. A6725

Triangle T(n,k), n>=1, 2<=k<=n+1, read by rows, where T(n,k) is the number of self-avoiding square-lattice polygons by area n and perimeter 2·k. A259857

Triangle of scaled 1-tiered binomial coefficients, T(n,k) = 2ⁿ⁺¹*(n-k,k)_1 (n >= 0, 0 <= k <= n), where (N,M)_1 is the 1-tiered binomial coefficient. A308737

Permutation A057506 applied four times ("⁴"), permutation A071662 squared. A71666