Properties of the Number 66280

Sixty-Six Thousand Two Hundred Eighty

Basics

Value: 66279 → 66280 → 66281

Parity: even

Prime: No

Previous Prime: 66271

Next Prime: 66293

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ³ × 5 × 1657

Divisors: 1, 2, 4, 5, 8, 10, 20, 40, 1657, 3314

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000001011101000

Octal: 201350

Duodecimal: 32434

Hexadecimal: 102e8

Square: 4393038400

Square Root: 257.4490240804964

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

Number of 2 X 2 matrices with all elements in {0,1,...,n} and determinant >=n. A210366

Number of n X 2 0..1 arrays with each 1 adjacent to 1 or 2 king-move neighboring 1s. A295841

Number of permutations of length n which avoid the patterns 1234, 3142, 3421. A116767

Let p(x) = 1063·x + 867·x² + 676·x³ + 322·x⁴ + 124·x⁵ + 36·x⁶ + 7·x⁷ + x⁸, expansion of the reciprocal polynomial of p(x). A158375

a(n) = 1ⁿ + 2ⁿ⁺¹ + 3ⁿ⁺². A66280