16668518512 has 40 divisors (see below), whose sum is σ = 34824177360. Its totient is φ = 7703032320.

The previous prime is 16668518491. The next prime is 16668518521. The reversal of 16668518512 is 21581586661.

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 7 ways as a sum of consecutive naturals, for example, 656203 + ... + 681130.

It is an arithmetic number, because the mean of its divisors is an integer number (870604434).

Almost surely, 2^16668518512 is an apocalyptic number.

It is an amenable number.

16668518512 is an abundant number, since it is smaller than the sum of its proper divisors (18155658848).

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

16668518512 is a wasteful number, since it uses less digits than its factorization.

16668518512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337401 (or 1337395 counting only the distinct ones).

The product of its digits is 691200, while the sum is 49.

The spelling of 16668518512 in words is "sixteen billion, six hundred sixty-eight million, five hundred eighteen thousand, five hundred twelve".