12116661066 has 12 divisors (see below), whose sum is σ = 26252765682. Its totient is φ = 4038887016.

The previous prime is 12116661059. The next prime is 12116661101. The reversal of 12116661066 is 66016661121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11594767041 + 521894025 = 107679^2 + 22845^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12116661066.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 336573901 + ... + 336573936.

Almost surely, 2^12116661066 is an apocalyptic number.

12116661066 is an abundant number, since it is smaller than the sum of its proper divisors (14136104616).

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

12116661066 is a wasteful number, since it uses less digits than its factorization.

12116661066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673147845 (or 673147842 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 12116661066 in words is "twelve billion, one hundred sixteen million, six hundred sixty-one thousand, sixty-six".