663532317825 has 48 divisors (see below), whose sum is σ = 1195662014400. Its totient is φ = 322726337280.

The previous prime is 663532317781. The next prime is 663532317839. The reversal of 663532317825 is 528713235366.

It is not a de Polignac number, because 663532317825 - 2¹¹ = 663532315777 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4018750 + ... + 4180599.

It is an arithmetic number, because the mean of its divisors is an integer number (24909625300).

Almost surely, 2^663532317825 is an apocalyptic number.

663532317825 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

663532317825 is a deficient number, since it is larger than the sum of its proper divisors (532129696575).

663532317825 is a wasteful number, since it uses less digits than its factorization.

663532317825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8199458 (or 8199453 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 51.

The spelling of 663532317825 in words is "six hundred sixty-three billion, five hundred thirty-two million, three hundred seventeen thousand, eight hundred twenty-five".