Properties of the Number 66509

Sixty-Six Thousand Five Hundred Nine

Basics

Value: 66508 → 66509 → 66510

Parity: odd

Prime: Yes

Previous Prime: 66499

Next Prime: 66523

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 66509

Divisors: 1, 66509

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10000001111001101

Octal: 201715

Duodecimal: 325A5

Hexadecimal: 103cd

Square: 4423447081

Square Root: 257.89338882569285

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

Numbers k such that (29^k - 3^k)/26 is prime. A384767

a(n) is the first of a triple of consecutive integers, each of which is the product of three distinct primes. A66509

Number of n X 3 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X 4 binary array having a sum of three or less, with rows and columns of the latter in lexicographically nondecreasing order. A227266