Properties of the Number 6642

Six Thousand Six Hundred Forty-Two

Basics

Value: 6641 → 6642 → 6643

Parity: even

Prime: No

Previous Prime: 6637

Next Prime: 6653

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ⁴ × 41

Divisors: 1, 2, 3, 6, 9, 18, 27, 41, 54, 81

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1100111110010

Octal: 14762

Duodecimal: 3A16

Hexadecimal: 19f2

Square: 44116164

Square Root: 81.49846624323675

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) = 2·n*(2·n-1). A2939

Numbers that are the sum of 2 positive 4th powers. A3336

Number of integer partitions of n with no adjacent parts having quotient >= 2. A342096

Sum of 4th powers of digits of n. A55013

a(n) = n²*(n²+1). A71253

Number of loop-graphical integer partitions of 2n. A339656

a(n) = n⁴*∏_{distinct primes p dividing n} (1+1/p⁴). A65960

Sums of two powers of 3. A55235

Sums of 2 distinct powers of 3. A38464

a(1) = 2, a(2) = 4, a(3) = 6; for n > 3, a(n) = 3·a(n-1) - 3·a(n-2) + 9·a(n-3). A318609