11661516166 has 24 divisors (see below), whose sum is σ = 18297442800. Its totient is φ = 5573719536.

The previous prime is 11661516151. The next prime is 11661516169. The reversal of 11661516166 is 66161516611.

11661516166 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661516169) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2561260 + ... + 2565808.

It is an arithmetic number, because the mean of its divisors is an integer number (762393450).

Almost surely, 2^11661516166 is an apocalyptic number.

11661516166 is a deficient number, since it is larger than the sum of its proper divisors (6635926634).

11661516166 is a wasteful number, since it uses less digits than its factorization.

11661516166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7020 (or 6997 counting only the distinct ones).

The product of its digits is 38880, while the sum is 40.

The spelling of 11661516166 in words is "eleven billion, six hundred sixty-one million, five hundred sixteen thousand, one hundred sixty-six".