Properties of the Number 66828

Sixty-Six Thousand Eight Hundred Twenty-Eight

Basics

Value: 66827 → 66828 → 66829

Parity: even

Prime: No

Previous Prime: 66821

Next Prime: 66841

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 5569

Divisors: 1, 2, 3, 4, 6, 12, 5569, 11138, 16707, 22276

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000010100001100

Octal: 202414

Duodecimal: 32810

Hexadecimal: 1050c

Square: 4465981584

Square Root: 258.5111216176202

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 (n+2) X (3+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00010101 00100101 or 01010101. A261260

a(n) = Sum{a(k): k=0,1,2,...,n-4,n-2,n-1}; a(n-3) is not a summand; initial terms are 1,3,3. A49871

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 00100101 or 01010101. A261265

Numbers k that divide the average of prime(k-1) and prime(k+1). A66828