Properties of the Number 40666

Forty Thousand Six Hundred Sixty-Six

Basics

Value: 40665 → 40666 → 40667

Parity: even

Prime: No

Previous Prime: 40639

Next Prime: 40693

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 20333

Divisors: 1, 2, 20333, 40666

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1001111011011010

Octal: 117332

Duodecimal: 1B64A

Hexadecimal: 9eda

Square: 1653723556

Square Root: 201.65812654093563

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

Sum of the seventh largest parts in the partitions of n into 9 parts. A326467

a(n) = ∑_i=0..n digsum(i)⁴, where digsum(i) = A007953(i). A231689

Sum of n-th row of triangle of 4th powers: 1; 1 16 1; 1 16 81 16 1; 1 16 81 256 81 16 1; ... (cf. A133824). A61803

Number of nX4 0..1 arrays with every element unequal to 1, 2, 5, 6 or 8 king-move adjacent elements, with upper left element zero. A305512

Continued fraction for sqrt(693). A40666