663330528 has 144 divisors (see below), whose sum is σ = 2180636640. Its totient is φ = 187342848.

The previous prime is 663330491. The next prime is 663330533. The reversal of 663330528 is 825033366.

It is a happy number.

663330528 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 (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 663330492 and 663330501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177576 + ... + 181272.

It is an arithmetic number, because the mean of its divisors is an integer number (15143310).

Almost surely, 2^663330528 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 663330528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1090318320).

663330528 is an abundant number, since it is smaller than the sum of its proper divisors (1517306112).

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

663330528 is a wasteful number, since it uses less digits than its factorization.

663330528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3809 (or 3798 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 663330528 is about 25755.2039013478. The cubic root of 663330528 is about 872.1208344740.

The spelling of 663330528 in words is "six hundred sixty-three million, three hundred thirty thousand, five hundred twenty-eight".