Properties of the Number 40665

Forty Thousand Six Hundred Sixty-Five

Basics

Value: 40664 → 40665 → 40666

Parity: odd

Prime: No

Previous Prime: 40639

Next Prime: 40693

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 2711

Divisors: 1, 3, 5, 15, 2711, 8133, 13555, 40665

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1001111011011001

Octal: 117331

Duodecimal: 1B649

Hexadecimal: 9ed9

Square: 1653642225

Square Root: 201.6556470818509

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) = ∑_k=0..n 4^k * binomial(n,k) * binomial(n+1,k). A388060

Numbers k such that 7*(10^k - 1)/9 - 10^floor(k/2) is a palindromic wing prime (a.k.a. near-repdigit palindromic prime). A77788

a(n) = K(n-1) + K(n) + K(n+1), where K(n) = A341711(floor(n/2)). A361151

Continued fraction for sqrt(692). A40665