663217260 has 48 divisors (see below), whose sum is σ = 1966247136. Its totient is φ = 166454272.

The previous prime is 663217229. The next prime is 663217273. The reversal of 663217260 is 62712366.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 324087 + ... + 326126.

It is an arithmetic number, because the mean of its divisors is an integer number (40963482).

Almost surely, 2^663217260 is an apocalyptic number.

663217260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

663217260 is an abundant number, since it is smaller than the sum of its proper divisors (1303029876).

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

663217260 is a wasteful number, since it uses less digits than its factorization.

663217260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650242 (or 650240 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 663217260 is about 25753.0048732182. The cubic root of 663217260 is about 872.0711915476.

The spelling of 663217260 in words is "six hundred sixty-three million, two hundred seventeen thousand, two hundred sixty".