12686860352666 has 8 divisors (see below), whose sum is σ = 20149719383700. Its totient is φ = 5970287224768.

The previous prime is 12686860352641. The next prime is 12686860352669. The reversal of 12686860352666 is 66625306868621.

It can be written as a sum of positive squares in 2 ways, for example, as 12186557355625 + 500302997041 = 3490925^2 + 707321^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12686860352669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186571475741 + ... + 186571475808.

Almost surely, 2^{12686860352666} is an apocalyptic number.

12686860352666 is a deficient number, since it is larger than the sum of its proper divisors (7462859031034).

12686860352666 is a wasteful number, since it uses less digits than its factorization.

12686860352666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373142951568.

The product of its (nonzero) digits is 179159040, while the sum is 65.

The spelling of 12686860352666 in words is "twelve trillion, six hundred eighty-six billion, eight hundred sixty million, three hundred fifty-two thousand, six hundred sixty-six".