663633330 has 64 divisors (see below), whose sum is σ = 1680307200. Its totient is φ = 167279040.

The previous prime is 663633323. The next prime is 663633353. The reversal of 663633330 is 33336366.

It is a junction number, because it is equal to n+sod(n) for n = 663633291 and 663633300.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 324451 + ... + 326489.

It is an arithmetic number, because the mean of its divisors is an integer number (26254800).

Almost surely, 2^663633330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663633330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (840153600).

663633330 is an abundant number, since it is smaller than the sum of its proper divisors (1016673870).

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

663633330 is a wasteful number, since it uses less digits than its factorization.

663633330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2639.

The product of its (nonzero) digits is 52488, while the sum is 33.

The square root of 663633330 is about 25761.0816931277. The cubic root of 663633330 is about 872.2535183317.

Adding to 663633330 its reverse (33336366), we get a palindrome (696969696).

The spelling of 663633330 in words is "six hundred sixty-three million, six hundred thirty-three thousand, three hundred thirty".