663558240 has 96 divisors (see below), whose sum is σ = 2093769216. Its totient is φ = 176647680.

The previous prime is 663558197. The next prime is 663558271. The reversal of 663558240 is 42855366.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

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, 538425 + ... + 539655.

It is an arithmetic number, because the mean of its divisors is an integer number (21810096).

Almost surely, 2^663558240 is an apocalyptic number.

663558240 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 663558240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1046884608).

663558240 is an abundant number, since it is smaller than the sum of its proper divisors (1430210976).

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

663558240 is a wasteful number, since it uses less digits than its factorization.

663558240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2372 (or 2364 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The square root of 663558240 is about 25759.6242208616. The cubic root of 663558240 is about 872.2206186443.

The spelling of 663558240 in words is "six hundred sixty-three million, five hundred fifty-eight thousand, two hundred forty".