256066013 has 12 divisors (see below), whose sum is σ = 299296512. Its totient is φ = 218436120.

The previous prime is 256066009. The next prime is 256066037. The reversal of 256066013 is 310660652.

It is not a de Polignac number, because 256066013 - 2² = 256066009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256066073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2045 + ... + 22722.

It is an arithmetic number, because the mean of its divisors is an integer number (24941376).

Almost surely, 2^256066013 is an apocalyptic number.

It is an amenable number.

256066013 is a deficient number, since it is larger than the sum of its proper divisors (43230499).

256066013 is a wasteful number, since it uses less digits than its factorization.

256066013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24992 (or 24985 counting only the distinct ones).

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

The square root of 256066013 is about 16002.0627732802. The cubic root of 256066013 is about 635.0149937559.

The spelling of 256066013 in words is "two hundred fifty-six million, sixty-six thousand, thirteen".