12666404105 has 8 divisors (see below), whose sum is σ = 15407900232. Its totient is φ = 9994313088.

The previous prime is 12666404071. The next prime is 12666404119. The reversal of 12666404105 is 50140466621.

It can be written as a sum of positive squares in 4 ways, for example, as 1597680841 + 11068723264 = 39971^2 + 105208^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12666404105 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17350874 + ... + 17351603.

It is an arithmetic number, because the mean of its divisors is an integer number (1925987529).

Almost surely, 2^12666404105 is an apocalyptic number.

It is an amenable number.

12666404105 is a deficient number, since it is larger than the sum of its proper divisors (2741496127).

12666404105 is an equidigital number, since it uses as much as digits as its factorization.

12666404105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34702555.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 12666404105 in words is "twelve billion, six hundred sixty-six million, four hundred four thousand, one hundred five".