26656013 has 4 divisors (see below), whose sum is σ = 26810268. Its totient is φ = 26501760.

The previous prime is 26655989. The next prime is 26656033. The reversal of 26656013 is 31065662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31065662 = 2 ⋅15532831.

It can be written as a sum of positive squares in 2 ways, for example, as 21557449 + 5098564 = 4643^2 + 2258^2 .

It is a cyclic number.

It is not a de Polignac number, because 26656013 - 2²⁰ = 25607437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26656033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76868 + ... + 77213.

It is an arithmetic number, because the mean of its divisors is an integer number (6702567).

Almost surely, 2^26656013 is an apocalyptic number.

It is an amenable number.

26656013 is a deficient number, since it is larger than the sum of its proper divisors (154255).

26656013 is a wasteful number, since it uses less digits than its factorization.

26656013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154254.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 26656013 is about 5162.9461550553. The cubic root of 26656013 is about 298.7205249773.

The spelling of 26656013 in words is "twenty-six million, six hundred fifty-six thousand, thirteen".