663345650 has 48 divisors (see below), whose sum is σ = 1349244000. Its totient is φ = 240633600.

The previous prime is 663345637. The next prime is 663345707. The reversal of 663345650 is 56543366.

It is a happy number.

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 23 ways as a sum of consecutive naturals, for example, 273242 + ... + 275658.

It is an arithmetic number, because the mean of its divisors is an integer number (28109250).

Almost surely, 2^663345650 is an apocalyptic number.

663345650 is an abundant number, since it is smaller than the sum of its proper divisors (685898350).

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

663345650 is a wasteful number, since it uses less digits than its factorization.

663345650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939 (or 2934 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 38.

The square root of 663345650 is about 25755.4974714137. The cubic root of 663345650 is about 872.1274616935.

The spelling of 663345650 in words is "six hundred sixty-three million, three hundred forty-five thousand, six hundred fifty".