Properties of the Number -66045

Sixty-Six Thousand Forty-Five

Basics

Value: -66046 → -66045 → -66044

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 7 × 17 × 37

Divisors: 1, 3, 5, 7, 15, 17, 21, 35, 37, 51

Polygonal

Triangular: No

Square: No

Pentagonal: Yes

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10000000111111101

Octal: -200775

Duodecimal: -32279

Hexadecimal: -101fd

Square: 4361942025

Square Root: 256.992217781006

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

Expansion of ∑_k>0 x^4·k/(1+x^k)⁵. A363618

sec(arcsin(x)+log(x+1))=1+4/2!*x²-6/3!*x³+107/4!*x⁴-490/5!*x⁵... A12909

Binomial coefficient binomial(n,4) = n*(n-1)*(n-2)*(n-3)/24. A332

Number of intersections of diagonals in the interior of a regular n-gon. A6561

Number of interior points that are the intersections of exactly two chords in the configuration A006561(n). A292104

Binomial coefficients binomial(2·n-3,4). A53126

a(n) = n*(n + 1)*(3·n² + 3·n - 2)/8. A236770

Doubly pentagonal numbers: a(n) = n*(3·n-2)*(3·n-1)*(3·n+1)/8. A232713

Triangle, read by rows, where T(n,k) = C( C(n+2,3) - C(k+2,3) + 3, n-k) for n>=k>=0. A126457

12-gonal (or dodecagonal) pyramidal numbers: a(n) = n*(n+1)*(10·n-7)/6. A7587