668023296 has 80 divisors (see below), whose sum is σ = 1884415104. Its totient is φ = 209567744.

The previous prime is 668023283. The next prime is 668023319. The reversal of 668023296 is 692320866.

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, 13321 + ... + 38903.

Almost surely, 2^668023296 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668023296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (942207552).

668023296 is an abundant number, since it is smaller than the sum of its proper divisors (1216391808).

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

668023296 is a wasteful number, since it uses less digits than its factorization.

668023296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25621 (or 25605 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 668023296 is about 25846.1466373616. The cubic root of 668023296 is about 874.1726256880.

The spelling of 668023296 in words is "six hundred sixty-eight million, twenty-three thousand, two hundred ninety-six".