Properties of the Number 6565

Six Thousand Five Hundred Sixty-Five

Basics

Value: 6564 → 6565 → 6566

Parity: odd

Prime: No

Previous Prime: 6563

Next Prime: 6569

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 5 × 13 × 101

Divisors: 1, 5, 13, 65, 101, 505, 1313, 6565

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1100110100101

Octal: 14645

Duodecimal: 3971

Hexadecimal: 19a5

Square: 43099225

Square Root: 81.02468759581859

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

a(n) = 4*(n+1)*n + 5. A78370

Numbers that are the sum of 7 positive 7th powers. A3374

Numbers that are the sum of 5 nonzero 8th powers. A3383

Numbers m that are the hypotenuse of exactly 13 distinct integer-sided right triangles, i.e., m² can be written as a sum of two squares in 13 ways. A97102

a(n) = (4·n³ - 12·n² + 14·n + 3)/3. A161703

Numbers which have only digits 5 and 6 in base 10. A256291

Numbers k such that k and k + 1 are both lazy-Lucas-Niven numbers (A351719). A351720

Numbers of the form (4k+3)²-8 or (4k+5)²+4. A214405

Numbers 1 through 10000 sorted lexicographically in ternary representation. A190128

Numbers k such that the Lucas Aurifeuillian primitive part B of Lucas(k) is prime. A61443