Properties of the Number 80665

Eighty Thousand Six Hundred Sixty-Five

Basics

Value: 80664 → 80665 → 80666

Parity: odd

Prime: No

Previous Prime: 80657

Next Prime: 80669

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 5 × 13 × 17 × 73

Divisors: 1, 5, 13, 17, 65, 73, 85, 221, 365, 949

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10011101100011001

Octal: 235431

Duodecimal: 3A821

Hexadecimal: 13b19

Square: 6506842225

Square Root: 284.01584462842914

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 that are the hypotenuse of exactly 40 distinct integer-sided right triangles, i.e., k² can be written as a sum of two squares in 40 ways. A97282

Number of ways to choose a multiset of strict partitions, or odd partitions, of odd numbers, whose weights sum to n. A300300

Numbers that are the sum of 2 nonzero squares in 7 or more ways. A25298

Numbers that are the sum of 2 nonzero squares in 8 or more ways. A25299

Numbers that are the sum of 2 distinct nonzero squares in 7 or more ways. A25317

Numbers that are the sum of 2 distinct nonzero squares in 8 or more ways. A25318

Numbers that are the sum of 2 nonzero squares in exactly 8 ways. A25291

Numbers n that are the product of four distinct odd primes and x² + y² = n has integer solutions. A264499

Numbers that are the sum of 2 distinct nonzero squares in exactly 8 ways. A25309

Decimal expansion of the standard gravity acceleration (one "gee") in SI units. A72915