668597818822 has 16 divisors (see below), whose sum is σ = 1013249861712. Its totient is φ = 330853916160.

The previous prime is 668597818783. The next prime is 668597818873. The reversal of 668597818822 is 228818795866.

668597818822 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 1291179 + ... + 1733302.

It is an arithmetic number, because the mean of its divisors is an integer number (63328116357).

Almost surely, 2^668597818822 is an apocalyptic number.

668597818822 is a deficient number, since it is larger than the sum of its proper divisors (344652042890).

668597818822 is a wasteful number, since it uses less digits than its factorization.

668597818822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3025623.

The product of its digits is 185794560, while the sum is 70.

The spelling of 668597818822 in words is "six hundred sixty-eight billion, five hundred ninety-seven million, eight hundred eighteen thousand, eight hundred twenty-two".