668009954660 has 48 divisors (see below), whose sum is σ = 1407627258240. Its totient is φ = 266290053120.

The previous prime is 668009954659. The next prime is 668009954701. The reversal of 668009954660 is 66459900866.

It is a self number, because there is not a number n which added to its sum of digits gives 668009954660.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6854756 + ... + 6951524.

It is an arithmetic number, because the mean of its divisors is an integer number (29325567880).

Almost surely, 2^668009954660 is an apocalyptic number.

It is an amenable number.

668009954660 is an abundant number, since it is smaller than the sum of its proper divisors (739617303580).

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

668009954660 is a wasteful number, since it uses less digits than its factorization.

668009954660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97956 (or 97954 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 59.

The spelling of 668009954660 in words is "six hundred sixty-eight billion, nine million, nine hundred fifty-four thousand, six hundred sixty".