660553615899 has 16 divisors (see below), whose sum is σ = 978722123040. Its totient is φ = 440313199200.

The previous prime is 660553615889. The next prime is 660553615927. The reversal of 660553615899 is 998516355066.

660553615899 is a `hidden beast` number, since 6 + 6 + 0 + 5 + 5 + 3 + 615 + 8 + 9 + 9 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-660553615899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660553615819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1334892 + ... + 1761545.

It is an arithmetic number, because the mean of its divisors is an integer number (61170132690).

Almost surely, 2^660553615899 is an apocalyptic number.

660553615899 is a deficient number, since it is larger than the sum of its proper divisors (318168507141).

660553615899 is a wasteful number, since it uses less digits than its factorization.

660553615899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3104347 (or 3104341 counting only the distinct ones).

The product of its (nonzero) digits is 52488000, while the sum is 63.

The spelling of 660553615899 in words is "six hundred sixty billion, five hundred fifty-three million, six hundred fifteen thousand, eight hundred ninety-nine".