11661061166 has 32 divisors (see below), whose sum is σ = 18325512576. Its totient is φ = 5559840000.

The previous prime is 11661061127. The next prime is 11661061171. The reversal of 11661061166 is 66116016611.

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, 1172816 + ... + 1182716.

It is an arithmetic number, because the mean of its divisors is an integer number (572672268).

Almost surely, 2^11661061166 is an apocalyptic number.

11661061166 is a deficient number, since it is larger than the sum of its proper divisors (6664451410).

11661061166 is a wasteful number, since it uses less digits than its factorization.

11661061166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10268.

The product of its (nonzero) digits is 7776, while the sum is 35.

Adding to 11661061166 its reverse (66116016611), we get a palindrome (77777077777).

The spelling of 11661061166 in words is "eleven billion, six hundred sixty-one million, sixty-one thousand, one hundred sixty-six".