11666111161 has 8 divisors (see below), whose sum is σ = 12449617920. Its totient is φ = 10893411648.

The previous prime is 11666111159. The next prime is 11666111201. The reversal of 11666111161 is 16111166611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11666111161 - 2¹ = 11666111159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11666111101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2699581 + ... + 2703898.

It is an arithmetic number, because the mean of its divisors is an integer number (1556202240).

Almost surely, 2^11666111161 is an apocalyptic number.

It is an amenable number.

11666111161 is a deficient number, since it is larger than the sum of its proper divisors (783506759).

11666111161 is a wasteful number, since it uses less digits than its factorization.

11666111161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5403623.

The product of its digits is 1296, while the sum is 31.

Adding to 11666111161 its reverse (16111166611), we get a palindrome (27777277772).

The spelling of 11666111161 in words is "eleven billion, six hundred sixty-six million, one hundred eleven thousand, one hundred sixty-one".