663511810416 has 80 divisors (see below), whose sum is σ = 2109627308544. Its totient is φ = 174992124672.

The previous prime is 663511810387. The next prime is 663511810529. The reversal of 663511810416 is 614018115366.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 75947076 + ... + 75955811.

Almost surely, 2^663511810416 is an apocalyptic number.

It is an amenable number.

663511810416 is an abundant number, since it is smaller than the sum of its proper divisors (1446115498128).

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

663511810416 is a wasteful number, since it uses less digits than its factorization.

663511810416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151902918 (or 151902912 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 663511810416 in words is "six hundred sixty-three billion, five hundred eleven million, eight hundred ten thousand, four hundred sixteen".