668853828408 has 16 divisors (see below), whose sum is σ = 1672134571080. Its totient is φ = 222951276128.

The previous prime is 668853828397. The next prime is 668853828443. The reversal of 668853828408 is 804828358866.

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 3 ways as a sum of consecutive naturals, for example, 13934454735 + ... + 13934454782.

Almost surely, 2^668853828408 is an apocalyptic number.

It is an amenable number.

668853828408 is an abundant number, since it is smaller than the sum of its proper divisors (1003280742672).

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

668853828408 is a wasteful number, since it uses less digits than its factorization.

668853828408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27868909526 (or 27868909522 counting only the distinct ones).

The product of its (nonzero) digits is 141557760, while the sum is 66.

The spelling of 668853828408 in words is "six hundred sixty-eight billion, eight hundred fifty-three million, eight hundred twenty-eight thousand, four hundred eight".