668169256 has 16 divisors (see below), whose sum is σ = 1267912800. Its totient is φ = 330059184.

The previous prime is 668169253. The next prime is 668169259. The reversal of 668169256 is 652961866.

It is a happy number.

668169256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (668169253) and next prime (668169259).

It is not an unprimeable number, because it can be changed into a prime (668169253) 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, 502476 + ... + 503803.

It is an arithmetic number, because the mean of its divisors is an integer number (79244550).

Almost surely, 2^668169256 is an apocalyptic number.

It is an amenable number.

668169256 is a deficient number, since it is larger than the sum of its proper divisors (599743544).

668169256 is a wasteful number, since it uses less digits than its factorization.

668169256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006368 (or 1006364 counting only the distinct ones).

The product of its digits is 933120, while the sum is 49.

The square root of 668169256 is about 25848.9701148808. The cubic root of 668169256 is about 874.2362886099.

The spelling of 668169256 in words is "six hundred sixty-eight million, one hundred sixty-nine thousand, two hundred fifty-six".