11501166506 has 16 divisors (see below), whose sum is σ = 17722143144. Its totient is φ = 5593857984.

The previous prime is 11501166487. The next prime is 11501166539. The reversal of 11501166506 is 60566110511.

It can be written as a sum of positive squares in 4 ways, for example, as 11489910481 + 11256025 = 107191^2 + 3355^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352376 + ... + 383628.

Almost surely, 2^11501166506 is an apocalyptic number.

11501166506 is a deficient number, since it is larger than the sum of its proper divisors (6220976638).

11501166506 is a wasteful number, since it uses less digits than its factorization.

11501166506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36265.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 11501166506 in words is "eleven billion, five hundred one million, one hundred sixty-six thousand, five hundred six".