Properties of the Number 26665

Twenty-Six Thousand Six Hundred Sixty-Five

Basics

Value: 26664 → 26665 → 26666

Parity: odd

Prime: No

Previous Prime: 26647

Next Prime: 26669

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 5 × 5333

Divisors: 1, 5, 5333, 26665

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110100000101001

Octal: 64051

Duodecimal: 13521

Hexadecimal: 6829

Square: 711022225

Square Root: 163.29421300217592

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

a(n) is the number of conjugacy classes in the alternating group A_n. A702

Numbers k such that φ(k-1)+1 divides σ(k). A256439

Let p = first digit of n, q = number obtained if p is removed from n; let r = last digit of n, s = number obtained if r is removed from n; sequence give n such that p·q = r·s ≠ 0, p! = q, and r! = s. A245364

Numbers in A245385 where P, Q, R, and S are all distinct. A245386

Numbers N such that N = P//Q = R//S, where // is the concatenation function, satisfying the following properties: P and S are m-digit integers, Q and R are k-digit integers, k and m are distinct positive integers, and P·Q = R·S. A245385

Integers without 0 as a digit, with an odd number of digits, that are not repdigits, and such that the 2 products [d₁ d₂...dk]*[d_k+1 d_k+2...d_2k+1] and [d₁ d₂...d_k+1]*[d_k+2 d_k+2...d_2k+1] are equal. A385145

a(n) = gcd(3ⁿ-2,2ⁿ-3). A109768

T(n,[ n/2 ]), T given by A026659. A26665