Properties of the Number 66679

Sixty-Six Thousand Six Hundred Seventy-Nine

Basics

Value: 66678 → 66679 → 66680

Parity: odd

Prime: No

Previous Prime: 66653

Next Prime: 66683

Digit Sum: 34

Digital Root: 7

Palindrome: No

Factorization: 131 × 509

Divisors: 1, 131, 509, 66679

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000010001110111

Octal: 202167

Duodecimal: 32707

Hexadecimal: 10477

Square: 4446089041

Square Root: 258.22277203995776

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

24 'Reverse and Add' steps are needed to reach a palindrome. A65318

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 35 ones. A31803

Number of zero-sum -n..n arrays of 5 elements with first through third differences also in -n..n. A202513

Expansion of ∑_k>=0 x^k*(k+1) / ∏_j=1..k (1 - j·x^j). A306663

Numbers n such that σ(n) is congruent to n mod φ(n). A66679

Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal median nondecreasing horizontally and vertically. A254451

Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal maximum minus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally. A254169