12505142312666 has 8 divisors (see below), whose sum is σ = 18757789589844. Its totient is φ = 6252545782720.

The previous prime is 12505142312633. The next prime is 12505142312687. The reversal of 12505142312666 is 66621324150521.

It can be written as a sum of positive squares in 2 ways, for example, as 12221981040025 + 283161272641 = 3495995^2 + 532129^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12064655 + ... + 13060098.

Almost surely, 2^{12505142312666} is an apocalyptic number.

12505142312666 is a deficient number, since it is larger than the sum of its proper divisors (6252647277178).

12505142312666 is a wasteful number, since it uses less digits than its factorization.

12505142312666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25373616.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 12505142312666 in words is "twelve trillion, five hundred five billion, one hundred forty-two million, three hundred twelve thousand, six hundred sixty-six".