11566331166 has 32 divisors (see below), whose sum is σ = 24921566208. Its totient is φ = 3557518560.

The previous prime is 11566331141. The next prime is 11566331209. The reversal of 11566331166 is 66113366511.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189031 + ... + 242621.

It is an arithmetic number, because the mean of its divisors is an integer number (778798944).

Almost surely, 2^11566331166 is an apocalyptic number.

11566331166 is an abundant number, since it is smaller than the sum of its proper divisors (13355235042).

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

11566331166 is a wasteful number, since it uses less digits than its factorization.

11566331166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56376.

The product of its digits is 58320, while the sum is 39.

Adding to 11566331166 its reverse (66113366511), we get a palindrome (77679697677).

The spelling of 11566331166 in words is "eleven billion, five hundred sixty-six million, three hundred thirty-one thousand, one hundred sixty-six".