663111444 has 12 divisors (see below), whose sum is σ = 1547260064. Its totient is φ = 221037144.

The previous prime is 663111431. The next prime is 663111451. The reversal of 663111444 is 444111366.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

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 3 ways as a sum of consecutive naturals, for example, 27629632 + ... + 27629655.

Almost surely, 2^663111444 is an apocalyptic number.

It is an amenable number.

663111444 is an abundant number, since it is smaller than the sum of its proper divisors (884148620).

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

663111444 is a wasteful number, since it uses less digits than its factorization.

663111444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55259294 (or 55259292 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 663111444 is about 25750.9503513948. The cubic root of 663111444 is about 872.0248095654.

The spelling of 663111444 in words is "six hundred sixty-three million, one hundred eleven thousand, four hundred forty-four".