663663732 has 24 divisors (see below), whose sum is σ = 1569763776. Its totient is φ = 218190528.

The previous prime is 663663727. The next prime is 663663739. The reversal of 663663732 is 237366366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663663739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377928 + ... + 379679.

It is an arithmetic number, because the mean of its divisors is an integer number (65406824).

Almost surely, 2^663663732 is an apocalyptic number.

It is an amenable number.

663663732 is an abundant number, since it is smaller than the sum of its proper divisors (906100044).

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

663663732 is a wasteful number, since it uses less digits than its factorization.

663663732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757687 (or 757685 counting only the distinct ones).

The product of its digits is 489888, while the sum is 42.

The square root of 663663732 is about 25761.6717625235. The cubic root of 663663732 is about 872.2668378589.

The spelling of 663663732 in words is "six hundred sixty-three million, six hundred sixty-three thousand, seven hundred thirty-two".