663255880 has 32 divisors (see below), whose sum is σ = 1705515840. Its totient is φ = 227401920.

The previous prime is 663255851. The next prime is 663255883. The reversal of 663255880 is 88552366.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (663255883) 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, 1184106 + ... + 1184665.

It is an arithmetic number, because the mean of its divisors is an integer number (53297370).

Almost surely, 2^663255880 is an apocalyptic number.

It is an amenable number.

663255880 is an abundant number, since it is smaller than the sum of its proper divisors (1042259960).

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

663255880 is a wasteful number, since it uses less digits than its factorization.

663255880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2368789 (or 2368785 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

The square root of 663255880 is about 25753.7546777164. The cubic root of 663255880 is about 872.0881184973.

The spelling of 663255880 in words is "six hundred sixty-three million, two hundred fifty-five thousand, eight hundred eighty".