Properties of the Number 6615

Six Thousand Six Hundred Fifteen

Basics

Value: 6614 → 6615 → 6616

Parity: odd

Prime: No

Previous Prime: 6607

Next Prime: 6619

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 5 × 7 ²

Divisors: 1, 3, 5, 7, 9, 15, 21, 27, 35, 45

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1100111010111

Octal: 14727

Duodecimal: 39B3

Hexadecimal: 19d7

Square: 43758225

Square Root: 81.33265027035576

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

Odd abundant numbers (odd numbers m whose sum of divisors exceeds 2m). A5231

Numbers whose unsorted prime signature is not unimodal. A332282

Multiples of 15 containing a 15 in their decimal representation. A121035

Number of partitions of n in which the greatest part is 9. A26815

Lower triangular array T(n,k) generator for group of arrays related to A001147 and A102625. A132382

a(n) = 7·a(n-1) -14·a(n-2) +7·a(n-3), with a(0)=1, a(1)=2, a(2)=7. A215143

3 times heptagonal numbers: a(n) = 3·n*(5·n-3)/2. A152773

Numbers n for which nontrivial positive magic squares of exactly 10 different orders with magic sum n exist. For a definition of nontrivial positive magic squares, see A125005. A125017

Numbers with exactly 3 distinct odd prime divisors {3,5,7}. A147576

a(n) = 3·n² + 12·n. A67707