666115005650 has 12 divisors (see below), whose sum is σ = 1238973910602. Its totient is φ = 266446002240.

The previous prime is 666115005641. The next prime is 666115005691. The reversal of 666115005650 is 56500511666.

666115005650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 574168392121 + 91946613529 = 757739^2 + 303227^2 .

It is a junction number, because it is equal to n+sod(n) for n = 666115005598 and 666115005607.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6661150007 + ... + 6661150106.

Almost surely, 2^666115005650 is an apocalyptic number.

666115005650 is a deficient number, since it is larger than the sum of its proper divisors (572858904952).

666115005650 is a wasteful number, since it uses less digits than its factorization.

666115005650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13322300125 (or 13322300120 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 666115005650 in words is "six hundred sixty-six billion, one hundred fifteen million, five thousand, six hundred fifty".