Properties of the Number 66209

Sixty-Six Thousand Two Hundred Nine

Basics

Value: 66208 → 66209 → 66210

Parity: odd

Prime: No

Previous Prime: 66191

Next Prime: 66221

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 11 × 13 × 463

Divisors: 1, 11, 13, 143, 463, 5093, 6019, 66209

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000001010100001

Octal: 201241

Duodecimal: 32395

Hexadecimal: 102a1

Square: 4383631681

Square Root: 257.3110957576451

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 subsets of {1,2,...,n} with the sum of reciprocals <= 1. A212657

Number of 3Xn 0..1 arrays with exactly floor(3Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order. A222511

Numbers m such that (4^m + 17) / 3 is prime. A261578

A053041(n)-10^n-1. A66209