668450179572 has 48 divisors (see below), whose sum is σ = 1782694932480. Its totient is φ = 190968502752.

The previous prime is 668450179571. The next prime is 668450179577. The reversal of 668450179572 is 275971054866.

It is a happy number.

It is a super-2 number, since 2×668450179572² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668450179571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 590053 + ... + 1298099.

It is an arithmetic number, because the mean of its divisors is an integer number (37139477760).

Almost surely, 2^668450179572 is an apocalyptic number.

It is an amenable number.

668450179572 is an abundant number, since it is smaller than the sum of its proper divisors (1114244752908).

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

668450179572 is a wasteful number, since it uses less digits than its factorization.

668450179572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719300 (or 719298 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 60.

The spelling of 668450179572 in words is "six hundred sixty-eight billion, four hundred fifty million, one hundred seventy-nine thousand, five hundred seventy-two".