Properties of the Number 66940

Sixty-Six Thousand Nine Hundred Forty

Basics

Value: 66939 → 66940 → 66941

Parity: even

Prime: No

Previous Prime: 66931

Next Prime: 66943

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 5 × 3347

Divisors: 1, 2, 4, 5, 10, 20, 3347, 6694, 13388, 16735

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000010101111100

Octal: 202574

Duodecimal: 328A4

Hexadecimal: 1057c

Square: 4480963600

Square Root: 258.7276560400917

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

Numbers which are the sum of their proper divisors containing the digit 3. A59462

a(n) = 20 + floor( (1 + ∑_j=1..n-1 a(j)) / 2 ). A120145

Numbers n with property that n² is a sum of some 120 successive primes. A166262

Numbers k such that gcd(prime(k+1) + 1, prime(k) + 1) = 2. A66940