12166111654 has 32 divisors (see below), whose sum is σ = 19301587200. Its totient is φ = 5735394720.

The previous prime is 12166111621. The next prime is 12166111679. The reversal of 12166111654 is 45611166121.

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, 10300944 + ... + 10302124.

It is an arithmetic number, because the mean of its divisors is an integer number (603174600).

Almost surely, 2^12166111654 is an apocalyptic number.

12166111654 is a deficient number, since it is larger than the sum of its proper divisors (7135475546).

12166111654 is a wasteful number, since it uses less digits than its factorization.

12166111654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2268.

The product of its digits is 8640, while the sum is 34.

Adding to 12166111654 its reverse (45611166121), we get a palindrome (57777277775).

The spelling of 12166111654 in words is "twelve billion, one hundred sixty-six million, one hundred eleven thousand, six hundred fifty-four".