12666671377946 has 8 divisors (see below), whose sum is σ = 19213490292660. Its totient is φ = 6262174613728.

The previous prime is 12666671377939. The next prime is 12666671377991. The reversal of 12666671377946 is 64977317666621.

It can be written as a sum of positive squares in 2 ways, for example, as 12548675692921 + 117995685025 = 3542411^2 + 343505^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 12666671377946.

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, 35580537401 + ... + 35580537756.

Almost surely, 2^{12666671377946} is an apocalyptic number.

12666671377946 is a deficient number, since it is larger than the sum of its proper divisors (6546818914714).

12666671377946 is an equidigital number, since it uses as much as digits as its factorization.

12666671377946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71161075248.

The product of its digits is 576108288, while the sum is 71.

The spelling of 12666671377946 in words is "twelve trillion, six hundred sixty-six billion, six hundred seventy-one million, three hundred seventy-seven thousand, nine hundred forty-six".