663503144 has 32 divisors (see below), whose sum is σ = 1284098400. Its totient is φ = 321245760.

The previous prime is 663503119. The next prime is 663503147. The reversal of 663503144 is 441305366.

It is a self number, because there is not a number n which added to its sum of digits gives 663503144.

It is not an unprimeable number, because it can be changed into a prime (663503147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21134 + ... + 42114.

It is an arithmetic number, because the mean of its divisors is an integer number (40128075).

Almost surely, 2^663503144 is an apocalyptic number.

It is an amenable number.

663503144 is a deficient number, since it is larger than the sum of its proper divisors (620595256).

663503144 is a wasteful number, since it uses less digits than its factorization.

663503144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21113 (or 21109 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 663503144 is about 25758.5547731234. The cubic root of 663503144 is about 872.1964774841.

The spelling of 663503144 in words is "six hundred sixty-three million, five hundred three thousand, one hundred forty-four".