Properties of the Number 66938

Sixty-Six Thousand Nine Hundred Thirty-Eight

Basics

Value: 66937 → 66938 → 66939

Parity: even

Prime: No

Previous Prime: 66931

Next Prime: 66943

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 2 × 33469

Divisors: 1, 2, 33469, 66938

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10000010101111010

Octal: 202572

Duodecimal: 328A2

Hexadecimal: 1057a

Square: 4480695844

Square Root: 258.72379094316005

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

Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} having exactly k entries that are midpoints of 321 patterns (0 <= k <= n-2 for n >= 2; k=0 for n=1). A145879

Semiprimes p such that next semiprime after p is p+20. A217335

Positive numbers whose square starts and ends with exactly 44, and no 444. A348831

Triangle T(n,k), read by rows, given by (1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, ...) δ (0, 0, 1, 1, 2, 2, 3, 3, 4, 4, ...) where δ is the operator defined in A084938. A202992

Primes of the form p·q+p+q, where p and q are primes. A66938