Properties of the Number 66550

Sixty-Six Thousand Five Hundred Fifty

Basics

Value: 66549 → 66550 → 66551

Parity: even

Prime: No

Previous Prime: 66541

Next Prime: 66553

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 5 ² × 11 ³

Divisors: 1, 2, 5, 10, 11, 22, 25, 50, 55, 110

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000001111110110

Octal: 201766

Duodecimal: 3261A

Hexadecimal: 103f6

Square: 4428902500

Square Root: 257.9728667902886

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

Number of ways to write n as an ordered sum of 10 nonzero triangular numbers. A340955

Square array A(n,k) = A341527(A246278(n,k)), read by falling antidiagonals; denominators of the columnwise first quotients of A341605/A341606. A341627

a(n) = (n+1)²*(n+2)³*(n+3)/24. A108648

Number of 3-almostprimes <= 2ⁿ. A127396

a(n) = if n mod 2 = 1 then n³*(n-1)²/2 else n⁵/2. A122658

a(n) = floor(1/{(10+n⁴)^1/4}), where {}=fractional part. A184634

For any number n with binary expansion ∑_{k = 1..m} 2^e_k (where 0 <= e₁ < ... < e_m), a(n) = ∏_{k = 1..m} prime(1+e_k)^k (where prime(k) denotes the k-th prime number). A344530

Number of nonempty subsets of {1,2,...,n} in which exactly 3/4 of the elements are <= n/3. A47197

Number of nonempty subsets of {1,2,...,n} in which exactly 3/4 of the elements are <= (n-1)/3. A48009

Number of nonempty subsets of {1,2,...,n} in which exactly 3/4 of the elements are <= (n-2)/3. A48020