256667713 has 8 divisors (see below), whose sum is σ = 270525920. Its totient is φ = 242844480.

The previous prime is 256667701. The next prime is 256667729. The reversal of 256667713 is 317766652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256667713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256667713.

It is not an unprimeable number, because it can be changed into a prime (256667753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7081 + ... + 23737.

It is an arithmetic number, because the mean of its divisors is an integer number (33815740).

Almost surely, 2^256667713 is an apocalyptic number.

It is an amenable number.

256667713 is a deficient number, since it is larger than the sum of its proper divisors (13858207).

256667713 is a wasteful number, since it uses less digits than its factorization.

256667713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17487.

The product of its digits is 317520, while the sum is 43.

The square root of 256667713 is about 16020.8524429882. The cubic root of 256667713 is about 635.5119875221.

The spelling of 256667713 in words is "two hundred fifty-six million, six hundred sixty-seven thousand, seven hundred thirteen".