Properties of the Number 66913

Sixty-Six Thousand Nine Hundred Thirteen

Basics

Value: 66912 → 66913 → 66914

Parity: odd

Prime: No

Previous Prime: 66889

Next Prime: 66919

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 7 × 11 ² × 79

Divisors: 1, 7, 11, 77, 79, 121, 553, 847, 869, 6083

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000010101100001

Octal: 202541

Duodecimal: 32881

Hexadecimal: 10561

Square: 4477349569

Square Root: 258.67547235870666

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

a(n) = Fibonacci(2n-1) - 2ⁿ + binomial(n,2) + 2. A356696

Square array A(n, k) = σ((2n-1)²) * σ((2k-1)²), read by antidiagonals. A379220

(sum of primes < n that do not divide n) (mod n). A66913