Properties of the Number 6691

Six Thousand Six Hundred Ninety-One

Basics

Value: 6690 → 6691 → 6692

Parity: odd

Prime: Yes

Previous Prime: 6689

Next Prime: 6701

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 6691

Divisors: 1, 6691

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1101000100011

Octal: 15043

Duodecimal: 3A57

Hexadecimal: 1a23

Square: 44769481

Square Root: 81.79853299418028

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: Yes

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Numbers that are the sum of 6 positive 7th powers. A3373

Number of primes between n·100000 and (n+1)*100000. A38825

A list of equal temperaments (equal divisions of the octave) whose nearest scale steps are closer and closer approximations to the ratios of six simple musical tones: 8/7 5/4 4/3 3/2 8/5 7/4. A60526

A list of equal temperaments (equal divisions of the octave) whose nearest scale steps are closer and closer approximations to the ratios of 8 musical tones: 8/7 16/11 5/4 4/3 3/2 8/5 11/8 7/4. A60527

Number of integer partitions of n with all distinct lengths of maximal anti-runs (decreasing by more than 1). A384885

Primes p such that A001175(p) = (p-1)/3. A308788

Primes p such that A001177(p) = (p-1)/3. A308796

Numbers that are the sum of six fourth powers in three or more ways. A345560

Numbers that are the sum of six fourth powers in four or more ways. A345561

Numbers that are the sum of six fourth powers in exactly four ways. A345816