663398560 has 48 divisors (see below), whose sum is σ = 1709763552. Its totient is φ = 241235200.

The previous prime is 663398521. The next prime is 663398563. The reversal of 663398560 is 65893366.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 663398560.

It is not an unprimeable number, because it can be changed into a prime (663398563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186706 + ... + 190225.

It is an arithmetic number, because the mean of its divisors is an integer number (35620074).

Almost surely, 2^663398560 is an apocalyptic number.

It is an amenable number.

663398560 is an abundant number, since it is smaller than the sum of its proper divisors (1046364992).

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

663398560 is a wasteful number, since it uses less digits than its factorization.

663398560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376957 (or 376949 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 46.

The square root of 663398560 is about 25756.5246102808. The cubic root of 663398560 is about 872.1506487189.

The spelling of 663398560 in words is "six hundred sixty-three million, three hundred ninety-eight thousand, five hundred sixty".