663623425922 has 6 divisors (see below), whose sum is σ = 995436866979. Its totient is φ = 331811136930.

The previous prime is 663623425909. The next prime is 663623425957. The reversal of 663623425922 is 229524326366.

It can be written as a sum of positive squares in only one way, i.e., 331811712961 + 331811712961 = 576031^2 + 576031^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=576031.

It is a Duffinian number.

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, 864047 + ... + 1440077.

Almost surely, 2^663623425922 is an apocalyptic number.

663623425922 is a deficient number, since it is larger than the sum of its proper divisors (331813441057).

663623425922 is an frugal number, since it uses more digits than its factorization.

663623425922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152064 (or 576033 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 50.

Multiplying 663623425922 by its sum of digits (50), we get a square (33181171296100 = 5760310²).

The spelling of 663623425922 in words is "six hundred sixty-three billion, six hundred twenty-three million, four hundred twenty-five thousand, nine hundred twenty-two".