13207665706 has 12 divisors (see below), whose sum is σ = 20361420198. Its totient is φ = 6425349552.

The previous prime is 13207665683. The next prime is 13207665707. The reversal of 13207665706 is 60756670231.

It can be written as a sum of positive squares in 3 ways, for example, as 11117804481 + 2089861225 = 105441^2 + 45715^2 .

It is not an unprimeable number, because it can be changed into a prime (13207665707) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2409181 + ... + 2414656.

Almost surely, 2^13207665706 is an apocalyptic number.

13207665706 is a deficient number, since it is larger than the sum of its proper divisors (7153754492).

13207665706 is an equidigital number, since it uses as much as digits as its factorization.

13207665706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4823913 (or 4823876 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 43.

The spelling of 13207665706 in words is "thirteen billion, two hundred seven million, six hundred sixty-five thousand, seven hundred six".