668296216 has 16 divisors (see below), whose sum is σ = 1432063440. Its totient is φ = 286412640.

The previous prime is 668296207. The next prime is 668296259. The reversal of 668296216 is 612692866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5966875 + ... + 5966986.

It is an arithmetic number, because the mean of its divisors is an integer number (89503965).

Almost surely, 2^668296216 is an apocalyptic number.

It is an amenable number.

668296216 is an abundant number, since it is smaller than the sum of its proper divisors (763767224).

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

668296216 is a wasteful number, since it uses less digits than its factorization.

668296216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11933874 (or 11933870 counting only the distinct ones).

The product of its digits is 373248, while the sum is 46.

The square root of 668296216 is about 25851.4258020713. The cubic root of 668296216 is about 874.2916568213.

The spelling of 668296216 in words is "six hundred sixty-eight million, two hundred ninety-six thousand, two hundred sixteen".