Properties of the Number 66724

Sixty-Six Thousand Seven Hundred Twenty-Four

Basics

Value: 66723 → 66724 → 66725

Parity: even

Prime: No

Previous Prime: 66721

Next Prime: 66733

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 7 × 2383

Divisors: 1, 2, 4, 7, 14, 28, 2383, 4766, 9532, 16681

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000010010100100

Octal: 202244

Duodecimal: 32744

Hexadecimal: 104a4

Square: 4452092176

Square Root: 258.30989140952386

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) = ∑_k=0..n T(n,k) * T(n,n+k), with T given by A027052. A27078

Number of n X 4 binary arrays with all 1s connected, a path of 1s from upper left corner to lower right corner, and no 1 having more than two 1s adjacent. A163687

Number of n X 10 binary arrays with all 1's connected, a path of 1's from upper left corner to lower right corner, and no 1 having more than two 1's adjacent. A163693

a(n) = prime(n)³ - n³. A262186

a(1) = 1, a(2) = 2; for n > 1, a(n) is the least integer > a(n-1) such that the products a(i)*a(j) for 1 <= i < j <= n are all distinct. A66724