12666706611 has 16 divisors (see below), whose sum is σ = 19145360640. Its totient is φ = 7384638240.

The previous prime is 12666706601. The next prime is 12666706643. The reversal of 12666706611 is 11660766621.

It is a happy number.

It is not a de Polignac number, because 12666706611 - 2⁹ = 12666706099 is a prime.

It is a super-2 number, since 2×12666706611² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12666706601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8546295 + ... + 8547776.

It is an arithmetic number, because the mean of its divisors is an integer number (1196585040).

Almost surely, 2^12666706611 is an apocalyptic number.

12666706611 is a deficient number, since it is larger than the sum of its proper divisors (6478654029).

12666706611 is a wasteful number, since it uses less digits than its factorization.

12666706611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17094106.

The product of its (nonzero) digits is 108864, while the sum is 42.

The spelling of 12666706611 in words is "twelve billion, six hundred sixty-six million, seven hundred six thousand, six hundred eleven".