663840018688 has 576 divisors, whose sum is σ = 1886952775680. Its totient is φ = 224899891200.

The previous prime is 663840018641. The next prime is 663840018697. The reversal of 663840018688 is 886810048366.

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, 261044745 + ... + 261047287.

It is an arithmetic number, because the mean of its divisors is an integer number (3275959680).

Almost surely, 2^663840018688 is an apocalyptic number.

663840018688 is a gapful number since it is divisible by the number (68) 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 663840018688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (943476387840).

663840018688 is an abundant number, since it is smaller than the sum of its proper divisors (1223112756992).

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

663840018688 is a wasteful number, since it uses less digits than its factorization.

663840018688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2654 (or 2640 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 58.

The spelling of 663840018688 in words is "six hundred sixty-three billion, eight hundred forty million, eighteen thousand, six hundred eighty-eight".