26668013 has 4 divisors (see below), whose sum is σ = 26694720. Its totient is φ = 26641308.

The previous prime is 26668007. The next prime is 26668021. The reversal of 26668013 is 31086662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26668013 - 2⁸ = 26667757 is a prime.

It is a super-2 number, since 2×26668013² = 1422365834736338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26668003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11795 + ... + 13872.

It is an arithmetic number, because the mean of its divisors is an integer number (6673680).

Almost surely, 2^26668013 is an apocalyptic number.

It is an amenable number.

26668013 is a deficient number, since it is larger than the sum of its proper divisors (26707).

26668013 is a wasteful number, since it uses less digits than its factorization.

26668013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26706.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 26668013 is about 5164.1081514624. The cubic root of 26668013 is about 298.7653442397.

The spelling of 26668013 in words is "twenty-six million, six hundred sixty-eight thousand, thirteen".