663103640 has 128 divisors (see below), whose sum is σ = 1608768000. Its totient is φ = 245514240.

The previous prime is 663103633. The next prime is 663103663. The reversal of 663103640 is 46301366.

It is a congruent number.

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, 4450286 + ... + 4450434.

It is an arithmetic number, because the mean of its divisors is an integer number (12568500).

Almost surely, 2^663103640 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 663103640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (804384000).

663103640 is an abundant number, since it is smaller than the sum of its proper divisors (945664360).

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

663103640 is a wasteful number, since it uses less digits than its factorization.

663103640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 663103640 is about 25750.7988225608. The cubic root of 663103640 is about 872.0213886682.

The spelling of 663103640 in words is "six hundred sixty-three million, one hundred three thousand, six hundred forty".