Properties of the Number 11660

Eleven Thousand Six Hundred Sixty

Basics

Value: 11659 → 11660 → 11661

Parity: even

Prime: No

Previous Prime: 11657

Next Prime: 11677

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 5 × 11 × 53

Divisors: 1, 2, 4, 5, 10, 11, 20, 22, 44, 53

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10110110001100

Octal: 26614

Duodecimal: 68B8

Hexadecimal: 2d8c

Square: 135955600

Square Root: 107.9814798935447

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

Second pentagonal numbers with even index: a(n) = n*(6·n+1). A49453

a(n) = n³ - n² + n - 1 = (n-1) * (n² + 1). A62158

Second accumulation array, T, of the natural number array A000027, by antidiagonals. A185507

Triangle read by rows: T(n,k) = number of rooted maps with n vertices and k faces on a non-orientable surface of type 2 (0 <= k <= n). A214806

n! in base 8. A127115

Expansion of ∏_k>=1 (1 + x^k²)²/(1 - x^k²)². A279227

a(n) = 16·n² - 4. A158443

Long legs of primitive Pythagorean triples (a,b,c) for which 2a+1, 2b+1 and 2c+1 are primes. A165237

Numbers that are the sum of an emirp and its reversal in more than one way. A345408

Number of rooted n-edge one-vertex maps on a non-orientable genus-4 surface (dually: one-face maps). A118449