668055538514 has 16 divisors (see below), whose sum is σ = 1233333302208. Its totient is φ = 264285707472.

The previous prime is 668055538499. The next prime is 668055538531. The reversal of 668055538514 is 415835550866.

It is a happy number.

668055538514 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 668055538514.

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, 1835317232 + ... + 1835317595.

It is an arithmetic number, because the mean of its divisors is an integer number (77083331388).

Almost surely, 2^668055538514 is an apocalyptic number.

668055538514 is a deficient number, since it is larger than the sum of its proper divisors (565277763694).

668055538514 is a wasteful number, since it uses less digits than its factorization.

668055538514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3670634849.

The product of its (nonzero) digits is 17280000, while the sum is 56.

The spelling of 668055538514 in words is "six hundred sixty-eight billion, fifty-five million, five hundred thirty-eight thousand, five hundred fourteen".