11661716166 has 32 divisors (see below), whose sum is σ = 24200786400. Its totient is φ = 3743179776.

The previous prime is 11661716161. The next prime is 11661716177. The reversal of 11661716166 is 66161716611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661716161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249241 + ... + 292308.

It is an arithmetic number, because the mean of its divisors is an integer number (756274575).

Almost surely, 2^11661716166 is an apocalyptic number.

11661716166 is an abundant number, since it is smaller than the sum of its proper divisors (12539070234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11661716166 is a wasteful number, since it uses less digits than its factorization.

11661716166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541688.

The product of its digits is 54432, while the sum is 42.

The spelling of 11661716166 in words is "eleven billion, six hundred sixty-one million, seven hundred sixteen thousand, one hundred sixty-six".