663563432 has 64 divisors (see below), whose sum is σ = 1531699200. Its totient is φ = 263229120.

The previous prime is 663563359. The next prime is 663563477. The reversal of 663563432 is 234365366.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31619 + ... + 48237.

It is an arithmetic number, because the mean of its divisors is an integer number (23932800).

Almost surely, 2^663563432 is an apocalyptic number.

663563432 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663563432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (765849600).

663563432 is an abundant number, since it is smaller than the sum of its proper divisors (868135768).

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

663563432 is a wasteful number, since it uses less digits than its factorization.

663563432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16686 (or 16682 counting only the distinct ones).

The product of its digits is 233280, while the sum is 38.

The square root of 663563432 is about 25759.7249985321. The cubic root of 663563432 is about 872.2228935301. Note that the first 3 decimals are identical.

The spelling of 663563432 in words is "six hundred sixty-three million, five hundred sixty-three thousand, four hundred thirty-two".