663952144 has 20 divisors (see below), whose sum is σ = 1287901324. Its totient is φ = 331590528.

The previous prime is 663952067. The next prime is 663952171. The reversal of 663952144 is 441259366.

It can be written as a sum of positive squares in 2 ways, for example, as 570636544 + 93315600 = 23888^2 + 9660^2 .

It is a junction number, because it is equal to n+sod(n) for n = 663952097 and 663952106.

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 3 ways as a sum of consecutive naturals, for example, 9627 + ... + 37690.

Almost surely, 2^663952144 is an apocalyptic number.

It is an amenable number.

663952144 is a deficient number, since it is larger than the sum of its proper divisors (623949180).

663952144 is a wasteful number, since it uses less digits than its factorization.

663952144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48202 (or 48196 counting only the distinct ones).

The product of its digits is 155520, while the sum is 40.

The square root of 663952144 is about 25767.2688502294. The cubic root of 663952144 is about 872.3931748262.

The spelling of 663952144 in words is "six hundred sixty-three million, nine hundred fifty-two thousand, one hundred forty-four".