663615140 has 24 divisors (see below), whose sum is σ = 1438547712. Its totient is φ = 256883040.

The previous prime is 663615107. The next prime is 663615151. The reversal of 663615140 is 41516366.

It is a junction number, because it is equal to n+sod(n) for n = 663615097 and 663615106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 534554 + ... + 535793.

It is an arithmetic number, because the mean of its divisors is an integer number (59939488).

Almost surely, 2^663615140 is an apocalyptic number.

It is an amenable number.

663615140 is an abundant number, since it is smaller than the sum of its proper divisors (774932572).

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

663615140 is a wasteful number, since it uses less digits than its factorization.

663615140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070387 (or 1070385 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 663615140 is about 25760.7286387633. The cubic root of 663615140 is about 872.2455488523.

The spelling of 663615140 in words is "six hundred sixty-three million, six hundred fifteen thousand, one hundred forty".