Properties of the Number 66944

Sixty-Six Thousand Nine Hundred Forty-Four

Basics

Value: 66943 → 66944 → 66945

Parity: even

Prime: No

Previous Prime: 66943

Next Prime: 66947

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 2 ⁷ × 523

Divisors: 1, 2, 4, 8, 16, 32, 64, 128, 523, 1046

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000010110000000

Octal: 202600

Duodecimal: 328A8

Hexadecimal: 10580

Square: 4481499136

Square Root: 258.73538606073964

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

Composites whose prime factorization in base 5 is an anagram of the number in base 5. A260049

Let p = n-th prime == 3 mod 8; a(n) = sum of quadratic residues mod p. A282723

Number of triangles a queen can make (starting anywhere) on an n X n board. A30117

Numbers n such that A242720(n) = prime(n)*(prime(n)+4)+3 and A242719(n) - A242720(n) = 2*(prime(n)-1). A247279

Smallest k > n such that there are exactly n pairs (x,y) (1 <= x <= y <= k) solutions of the equation: φ(xy)=σ(x)+σ(y). A71780

Numbers k such that gcd(prime(k+1) + 1, prime(k) + 1) = 10. A66944

G.f. satisfies: x = A(x) - A(A(x))² - A(A(A(x)))². A177397