663171128 has 64 divisors (see below), whose sum is σ = 1324114560. Its totient is φ = 310957056.

The previous prime is 663171083. The next prime is 663171133. The reversal of 663171128 is 821171366.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1015250 + ... + 1015902.

It is an arithmetic number, because the mean of its divisors is an integer number (20689290).

Almost surely, 2^663171128 is an apocalyptic number.

It is an amenable number.

663171128 is a deficient number, since it is larger than the sum of its proper divisors (660943432).

663171128 is a wasteful number, since it uses less digits than its factorization.

663171128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816 (or 812 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The square root of 663171128 is about 25752.1091951708. The cubic root of 663171128 is about 872.0509712651.

The spelling of 663171128 in words is "six hundred sixty-three million, one hundred seventy-one thousand, one hundred twenty-eight".