663883520 has 72 divisors (see below), whose sum is σ = 1606902864. Its totient is φ = 262766592.

The previous prime is 663883511. The next prime is 663883529. The reversal of 663883520 is 25388366.

It is an interprime number because it is at equal distance from previous prime (663883511) and next prime (663883529).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663883529) 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 7 ways as a sum of consecutive naturals, for example, 121487 + ... + 126833.

Almost surely, 2^663883520 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 663883520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (803451432).

663883520 is an abundant number, since it is smaller than the sum of its proper divisors (943019344).

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

663883520 is an equidigital number, since it uses as much as digits as its factorization.

663883520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5465 (or 5451 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 663883520 is about 25765.9372039909. The cubic root of 663883520 is about 872.3631178547.

The spelling of 663883520 in words is "six hundred sixty-three million, eight hundred eighty-three thousand, five hundred twenty".