11661775166 has 4 divisors (see below), whose sum is σ = 17492662752. Its totient is φ = 5830887582.

The previous prime is 11661775159. The next prime is 11661775201. The reversal of 11661775166 is 66157716611.

11661775166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 11661775166.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 2915443790 + ... + 2915443793.

It is an arithmetic number, because the mean of its divisors is an integer number (4373165688).

Almost surely, 2^11661775166 is an apocalyptic number.

11661775166 is a deficient number, since it is larger than the sum of its proper divisors (5830887586).

11661775166 is an equidigital number, since it uses as much as digits as its factorization.

11661775166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5830887585.

The product of its digits is 317520, while the sum is 47.

The spelling of 11661775166 in words is "eleven billion, six hundred sixty-one million, seven hundred seventy-five thousand, one hundred sixty-six".