Properties of the Number 66728

Sixty-Six Thousand Seven Hundred Twenty-Eight

Basics

Value: 66727 → 66728 → 66729

Parity: even

Prime: No

Previous Prime: 66721

Next Prime: 66733

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 2 ³ × 19 × 439

Divisors: 1, 2, 4, 8, 19, 38, 76, 152, 439, 878

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000010010101000

Octal: 202250

Duodecimal: 32748

Hexadecimal: 104a8

Square: 4452625984

Square Root: 258.3176339315611

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

T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 1, 2, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero. A317036

Number of nondecreasing sequences of 4 1..n integers with no element dividing the sequence sum. A212871

Indices of primes in sequence defined by A(0) = 59, A(n) = 10·A(n-1) - 41 for n > 0. A101581

Number of nX5 0..1 arrays with every element unequal to 0, 1, 2, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero. A317033

Number of n X 6 0..1 arrays with every element unequal to 0, 1, 2, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero. A317034

Number of terms of A182116 between 2ⁿ and 2ⁿ⁺¹. A242435

a(n) is the number of integers of the form (n+k+n·k)/(n-k) for k = 1,2,...,n-1. A66728