663632736 has 96 divisors (see below), whose sum is σ = 1883669760. Its totient is φ = 203364864.

The previous prime is 663632729. The next prime is 663632737. The reversal of 663632736 is 637236366.

663632736 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663632737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 352245 + ... + 354123.

It is an arithmetic number, because the mean of its divisors is an integer number (19621560).

Almost surely, 2^663632736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663632736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (941834880).

663632736 is an abundant number, since it is smaller than the sum of its proper divisors (1220037024).

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

663632736 is a wasteful number, since it uses less digits than its factorization.

663632736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188 (or 2180 counting only the distinct ones).

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

The square root of 663632736 is about 25761.0701641061. The cubic root of 663632736 is about 872.2532580882.

The spelling of 663632736 in words is "six hundred sixty-three million, six hundred thirty-two thousand, seven hundred thirty-six".