168022566818 has 6 divisors (see below), whose sum is σ = 252034719771. Its totient is φ = 84010993562.

The previous prime is 168022566809. The next prime is 168022566821. The reversal of 168022566818 is 818665220861.

It can be written as a sum of positive squares in only one way, i.e., 84011283409 + 84011283409 = 289847^2 + 289847^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=289847.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168022566818.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 434771 + ... + 724617.

Almost surely, 2^168022566818 is an apocalyptic number.

168022566818 is a deficient number, since it is larger than the sum of its proper divisors (84012152953).

168022566818 is an frugal number, since it uses more digits than its factorization.

168022566818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579696 (or 289849 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 53.

The spelling of 168022566818 in words is "one hundred sixty-eight billion, twenty-two million, five hundred sixty-six thousand, eight hundred eighteen".