663111680 has 288 divisors, whose sum is σ = 2054445120. Its totient is φ = 199557120.

The previous prime is 663111667. The next prime is 663111721. The reversal of 663111680 is 86111366.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22865906 + ... + 22865934.

It is an arithmetic number, because the mean of its divisors is an integer number (7133490).

Almost surely, 2^663111680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663111680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1027222560).

663111680 is an abundant number, since it is smaller than the sum of its proper divisors (1391333440).

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

663111680 is a wasteful number, since it uses less digits than its factorization.

663111680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 663111680 is about 25750.9549337495. The cubic root of 663111680 is about 872.0249130160.

The spelling of 663111680 in words is "six hundred sixty-three million, one hundred eleven thousand, six hundred eighty".