256668707 has 8 divisors (see below), whose sum is σ = 268823040. Its totient is φ = 244597320.

The previous prime is 256668697. The next prime is 256668719. The reversal of 256668707 is 707866652.

256668707 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 256668707 - 2⁴ = 256668691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256668757) 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, 14357 + ... + 26822.

It is an arithmetic number, because the mean of its divisors is an integer number (33602880).

Almost surely, 2^256668707 is an apocalyptic number.

256668707 is a deficient number, since it is larger than the sum of its proper divisors (12154333).

256668707 is a wasteful number, since it uses less digits than its factorization.

256668707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41473.

The product of its (nonzero) digits is 846720, while the sum is 47.

The square root of 256668707 is about 16020.8834650278. The cubic root of 256668707 is about 635.5128079059.

The spelling of 256668707 in words is "two hundred fifty-six million, six hundred sixty-eight thousand, seven hundred seven".