668038611616 has 24 divisors (see below), whose sum is σ = 1315219278240. Its totient is φ = 334014667968.

The previous prime is 668038611599. The next prime is 668038611619. The reversal of 668038611616 is 616116830866.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (668038611619) 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, 4195735 + ... + 4352041.

It is an arithmetic number, because the mean of its divisors is an integer number (54800803260).

Almost surely, 2^668038611616 is an apocalyptic number.

It is an amenable number.

668038611616 is a deficient number, since it is larger than the sum of its proper divisors (647180666624).

668038611616 is a wasteful number, since it uses less digits than its factorization.

668038611616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289876 (or 289868 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 668038611616 in words is "six hundred sixty-eight billion, thirty-eight million, six hundred eleven thousand, six hundred sixteen".