Properties of the Number 66512

Sixty-Six Thousand Five Hundred Twelve

Basics

Value: 66511 → 66512 → 66513

Parity: even

Prime: No

Previous Prime: 66509

Next Prime: 66523

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ⁴ × 4157

Divisors: 1, 2, 4, 8, 16, 4157, 8314, 16628, 33256, 66512

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000001111010000

Octal: 201720

Duodecimal: 325A8

Hexadecimal: 103d0

Square: 4423846144

Square Root: 257.8992051170379

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 (n+1)X(k+1) 0..3 arrays with the maximum plus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one. A237927

Number of (n+1)X(1+1) 0..3 arrays with the maximum plus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one. A237922

Number of (n+1)X(4+1) 0..3 arrays with the maximum plus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one. A237925

Positive numbers whose square starts and ends with exactly 44, and no 444. A348831

Numbers whose base-3 representation has exactly 11 runs. A43591

Least nonnegative integer not the sum or product of any previous pair. a(1)=0. A66512