663871080 has 128 divisors (see below), whose sum is σ = 2200608000. Its totient is φ = 159363072.

The previous prime is 663871079. The next prime is 663871093. The reversal of 663871080 is 80178366.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39846 + ... + 53994.

It is an arithmetic number, because the mean of its divisors is an integer number (17192250).

Almost surely, 2^663871080 is an apocalyptic number.

663871080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663871080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1100304000).

663871080 is an abundant number, since it is smaller than the sum of its proper divisors (1536736920).

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

663871080 is a wasteful number, since it uses less digits than its factorization.

663871080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14203 (or 14199 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 663871080 is about 25765.6957988718. The cubic root of 663871080 is about 872.3576689747.

The spelling of 663871080 in words is "six hundred sixty-three million, eight hundred seventy-one thousand, eighty".