663645532 has 12 divisors (see below), whose sum is σ = 1266959736. Its totient is φ = 301657040.

The previous prime is 663645529. The next prime is 663645539. The reversal of 663645532 is 235546366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663645539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7541383 + ... + 7541470.

It is an arithmetic number, because the mean of its divisors is an integer number (105579978).

Almost surely, 2^663645532 is an apocalyptic number.

It is an amenable number.

663645532 is a deficient number, since it is larger than the sum of its proper divisors (603314204).

663645532 is a wasteful number, since it uses less digits than its factorization.

663645532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15082868 (or 15082866 counting only the distinct ones).

The product of its digits is 388800, while the sum is 40.

The square root of 663645532 is about 25761.3185221564. The cubic root of 663645532 is about 872.2588642417.

The spelling of 663645532 in words is "six hundred sixty-three million, six hundred forty-five thousand, five hundred thirty-two".