668066480628 has 24 divisors (see below), whose sum is σ = 1558850567232. Its totient is φ = 222684715584.

The previous prime is 668066480593. The next prime is 668066480657. The reversal of 668066480628 is 826084660866.

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, 203176 + ... + 1173632.

It is an arithmetic number, because the mean of its divisors is an integer number (64952106968).

Almost surely, 2^668066480628 is an apocalyptic number.

It is an amenable number.

668066480628 is an abundant number, since it is smaller than the sum of its proper divisors (890784086604).

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

668066480628 is a wasteful number, since it uses less digits than its factorization.

668066480628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027831 (or 1027829 counting only the distinct ones).

The product of its (nonzero) digits is 31850496, while the sum is 60.

The spelling of 668066480628 in words is "six hundred sixty-eight billion, sixty-six million, four hundred eighty thousand, six hundred twenty-eight".