663542880 has 384 divisors, whose sum is σ = 2808400896. Its totient is φ = 127180800.

The previous prime is 663542863. The next prime is 663542899. The reversal of 663542880 is 88245366.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 479790 + ... + 481170.

It is an arithmetic number, because the mean of its divisors is an integer number (7313544).

Almost surely, 2^663542880 is an apocalyptic number.

663542880 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 663542880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1404200448).

663542880 is an abundant number, since it is smaller than the sum of its proper divisors (2144858016).

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

663542880 is a wasteful number, since it uses less digits than its factorization.

663542880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430 (or 1422 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 663542880 is about 25759.3260781411. The cubic root of 663542880 is about 872.2138885583.

The spelling of 663542880 in words is "six hundred sixty-three million, five hundred forty-two thousand, eight hundred eighty".