663544944 has 30 divisors (see below), whose sum is σ = 1857004656. Its totient is φ = 221181600.

The previous prime is 663544909. The next prime is 663544949. The reversal of 663544944 is 449445366.

663544944 is a `hidden beast` number, since 6 + 63 + 544 + 9 + 44 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 663544944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663544949) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2303832 + ... + 2304119.

Almost surely, 2^663544944 is an apocalyptic number.

It is an amenable number.

663544944 is an abundant number, since it is smaller than the sum of its proper divisors (1193459712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663544944 is a wasteful number, since it uses less digits than its factorization.

663544944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4607965 (or 4607956 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 45.

The square root of 663544944 is about 25759.3661412699. The cubic root of 663544944 is about 872.2147929197.

The spelling of 663544944 in words is "six hundred sixty-three million, five hundred forty-four thousand, nine hundred forty-four".