663241660 has 24 divisors (see below), whose sum is σ = 1402979760. Its totient is φ = 263359104.

The previous prime is 663241651. The next prime is 663241693. The reversal of 663241660 is 66142366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118290 + ... + 123769.

It is an arithmetic number, because the mean of its divisors is an integer number (58457490).

Almost surely, 2^663241660 is an apocalyptic number.

It is an amenable number.

663241660 is an abundant number, since it is smaller than the sum of its proper divisors (739738100).

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

663241660 is a wasteful number, since it uses less digits than its factorization.

663241660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242205 (or 242203 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 663241660 is about 25753.4785999872. The cubic root of 663241660 is about 872.0818860200.

The spelling of 663241660 in words is "six hundred sixty-three million, two hundred forty-one thousand, six hundred sixty".