668055177244 has 48 divisors (see below), whose sum is σ = 1438985722048. Its totient is φ = 264267629568.

The previous prime is 668055177149. The next prime is 668055177263. The reversal of 668055177244 is 442771550866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6162292 + ... + 6269764.

Almost surely, 2^668055177244 is an apocalyptic number.

It is an amenable number.

668055177244 is an abundant number, since it is smaller than the sum of its proper divisors (770930544804).

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

668055177244 is a wasteful number, since it uses less digits than its factorization.

668055177244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124574 (or 124572 counting only the distinct ones).

The product of its (nonzero) digits is 11289600, while the sum is 55.

The spelling of 668055177244 in words is "six hundred sixty-eight billion, fifty-five million, one hundred seventy-seven thousand, two hundred forty-four".