668462256 has 360 divisors, whose sum is σ = 2476341504. Its totient is φ = 163503360.

The previous prime is 668462191. The next prime is 668462261. The reversal of 668462256 is 652264866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4002685 + ... + 4002851.

Almost surely, 2^668462256 is an apocalyptic number.

668462256 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668462256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1238170752).

668462256 is an abundant number, since it is smaller than the sum of its proper divisors (1807879248).

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

668462256 is a wasteful number, since it uses less digits than its factorization.

668462256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 209 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 668462256 is about 25854.6370309080. The cubic root of 668462256 is about 874.3640575335.

The spelling of 668462256 in words is "six hundred sixty-eight million, four hundred sixty-two thousand, two hundred fifty-six".