663245920 has 96 divisors (see below), whose sum is σ = 1665619200. Its totient is φ = 248864256.

The previous prime is 663245911. The next prime is 663245923. The reversal of 663245920 is 29542366.

It is a self number, because there is not a number n which added to its sum of digits gives 663245920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663245923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 324261 + ... + 326299.

It is an arithmetic number, because the mean of its divisors is an integer number (17350200).

Almost surely, 2^663245920 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 663245920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (832809600).

663245920 is an abundant number, since it is smaller than the sum of its proper divisors (1002373280).

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

663245920 is a wasteful number, since it uses less digits than its factorization.

663245920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180 (or 2172 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 663245920 is about 25753.5613071280. The cubic root of 663245920 is about 872.0837531428.

The spelling of 663245920 in words is "six hundred sixty-three million, two hundred forty-five thousand, nine hundred twenty".