668152686 has 16 divisors (see below), whose sum is σ = 1343091024. Its totient is φ = 221586624.

The previous prime is 668152679. The next prime is 668152733. The reversal of 668152686 is 686251866.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281455 + ... + 283818.

It is an arithmetic number, because the mean of its divisors is an integer number (83943189).

Almost surely, 2^668152686 is an apocalyptic number.

668152686 is an abundant number, since it is smaller than the sum of its proper divisors (674938338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668152686 is a wasteful number, since it uses less digits than its factorization.

668152686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565475.

The product of its digits is 829440, while the sum is 48.

The square root of 668152686 is about 25848.6495972227. The cubic root of 668152686 is about 874.2290617908.

The spelling of 668152686 in words is "six hundred sixty-eight million, one hundred fifty-two thousand, six hundred eighty-six".