668903629054 has 16 divisors (see below), whose sum is σ = 1021241834496. Its totient is φ = 328524449400.

The previous prime is 668903628973. The next prime is 668903629087. The reversal of 668903629054 is 450926309866.

It is a super-2 number, since 2×668903629054² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 668903629054.

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, 8652642 + ... + 8729605.

It is an arithmetic number, because the mean of its divisors is an integer number (63827614656).

Almost surely, 2^668903629054 is an apocalyptic number.

668903629054 is a deficient number, since it is larger than the sum of its proper divisors (352338205442).

668903629054 is a wasteful number, since it uses less digits than its factorization.

668903629054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17382591.

The product of its (nonzero) digits is 16796160, while the sum is 58.

The spelling of 668903629054 in words is "six hundred sixty-eight billion, nine hundred three million, six hundred twenty-nine thousand, fifty-four".