663967932 has 12 divisors (see below), whose sum is σ = 1549258536. Its totient is φ = 221322640.

The previous prime is 663967907. The next prime is 663968017. The reversal of 663967932 is 239769366.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27665319 + ... + 27665342.

It is an arithmetic number, because the mean of its divisors is an integer number (129104878).

Almost surely, 2^663967932 is an apocalyptic number.

It is an amenable number.

663967932 is an abundant number, since it is smaller than the sum of its proper divisors (885290604).

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

663967932 is a wasteful number, since it uses less digits than its factorization.

663967932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55330668 (or 55330666 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 51.

The square root of 663967932 is about 25767.5752060608. The cubic root of 663967932 is about 872.4000895988.

The spelling of 663967932 in words is "six hundred sixty-three million, nine hundred sixty-seven thousand, nine hundred thirty-two".