663336423625 has 16 divisors (see below), whose sum is σ = 876540556944. Its totient is φ = 499453305600.

The previous prime is 663336423553. The next prime is 663336423643. The reversal of 663336423625 is 526324633366.

663336423625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 304813305801 + 358523117824 = 552099^2 + 598768^2 .

It is not a de Polignac number, because 663336423625 - 2²⁵ = 663302869193 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156077034 + ... + 156081283.

It is an arithmetic number, because the mean of its divisors is an integer number (54783784809).

Almost surely, 2^663336423625 is an apocalyptic number.

It is an amenable number.

663336423625 is a deficient number, since it is larger than the sum of its proper divisors (213204133319).

663336423625 is a wasteful number, since it uses less digits than its factorization.

663336423625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312158349 (or 312158339 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 49.

The spelling of 663336423625 in words is "six hundred sixty-three billion, three hundred thirty-six million, four hundred twenty-three thousand, six hundred twenty-five".