Properties of the Number 66500

Sixty-Six Thousand Five Hundred

Basics

Value: 66499 → 66500 → 66501

Parity: even

Prime: No

Previous Prime: 66499

Next Prime: 66509

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 5 ³ × 7 × 19

Divisors: 1, 2, 4, 5, 7, 10, 14, 19, 20, 25

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000001111000100

Octal: 201704

Duodecimal: 32598

Hexadecimal: 103c4

Square: 4422250000

Square Root: 257.87593916455256

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

Lesser of amicable pair m < n defined by t(n) = m and t(m) = n where t(n) = ψ(n) - n and ψ(n) = A001615(n) is the Dedekind ψ function. A323329

List of free corner-connected polyominoes in binary code (as defined in A246521), ordered first by number of bits, then by value of the binary code. A364928

Numbers k such that 5 divides φ(k). A66500

E.g.f. A(x) satisfies: A( 1/A(x) * Integral A(x) dx ) = 1 + x. A276742