Properties of the Number 66844

Sixty-Six Thousand Eight Hundred Forty-Four

Basics

Value: 66843 → 66844 → 66845

Parity: even

Prime: No

Previous Prime: 66841

Next Prime: 66851

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 17 × 983

Divisors: 1, 2, 4, 17, 34, 68, 983, 1966, 3932, 16711

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000010100011100

Octal: 202434

Duodecimal: 32824

Hexadecimal: 1051c

Square: 4468120336

Square Root: 258.54206620973696

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

Stern's sequence: a(1) = 1, a(n+1) is the sum of the m preceding terms, where m*(m-1)/2 < n <= m*(m+1)/2 or equivalently m = ceiling((sqrt(8·n+1)-1)/2) = A002024(n). A5230

Displacement under constant discrete unit surge. A207361

Constant term of the reduction by x²->x+1 of the polynomial p(n,x) defined at Comments. A193006

Number of 2 X 2 matrices having all terms in {-n,...,0,...,n} and determinant >= 2n. A211152

Number of compositions of n where the difference between largest and smallest parts equals six. A323123

Number of (n+1)X(2+1) 0..3 arrays with nondecreasing max(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction. A250530

Number of (2+1)X(n+1) 0..3 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction. A250709

Film speeds. A66844