12566332705 has 4 divisors (see below), whose sum is σ = 15079599252. Its totient is φ = 10053066160.

The previous prime is 12566332699. The next prime is 12566332711. The reversal of 12566332705 is 50723366521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50723366521 = 41 ⋅1237155281.

It is an interprime number because it is at equal distance from previous prime (12566332699) and next prime (12566332711).

It can be written as a sum of positive squares in 2 ways, for example, as 4066230289 + 8500102416 = 63767^2 + 92196^2 .

It is not a de Polignac number, because 12566332705 - 2⁵ = 12566332673 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1256633266 + ... + 1256633275.

It is an arithmetic number, because the mean of its divisors is an integer number (3769899813).

Almost surely, 2^12566332705 is an apocalyptic number.

It is an amenable number.

12566332705 is a deficient number, since it is larger than the sum of its proper divisors (2513266547).

12566332705 is an equidigital number, since it uses as much as digits as its factorization.

12566332705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513266546.

The product of its (nonzero) digits is 226800, while the sum is 40.

The spelling of 12566332705 in words is "twelve billion, five hundred sixty-six million, three hundred thirty-two thousand, seven hundred five".