663388244 has 24 divisors (see below), whose sum is σ = 1194331488. Its totient is φ = 322181280.

The previous prime is 663388199. The next prime is 663388247. The reversal of 663388244 is 442883366.

It is a junction number, because it is equal to n+sod(n) for n = 663388195 and 663388204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663388247) 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, 91679 + ... + 98649.

It is an arithmetic number, because the mean of its divisors is an integer number (49763812).

Almost surely, 2^663388244 is an apocalyptic number.

It is an amenable number.

663388244 is a deficient number, since it is larger than the sum of its proper divisors (530943244).

663388244 is a wasteful number, since it uses less digits than its factorization.

663388244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7655 (or 7653 counting only the distinct ones).

The product of its digits is 663552, while the sum is 44.

The square root of 663388244 is about 25756.3243495651. The cubic root of 663388244 is about 872.1461279811.

The spelling of 663388244 in words is "six hundred sixty-three million, three hundred eighty-eight thousand, two hundred forty-four".