12666541937796 has 36 divisors (see below), whose sum is σ = 32044087097932. Its totient is φ = 4218767388864.

The previous prime is 12666541937773. The next prime is 12666541937831. The reversal of 12666541937796 is 69773914566621.

It can be written as a sum of positive squares in 2 ways, for example, as 5209349760000 + 7457192177796 = 2282400^2 + 2730786^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142173895 + ... + 142262958.

Almost surely, 2^{12666541937796} is an apocalyptic number.

It is an amenable number.

12666541937796 is an abundant number, since it is smaller than the sum of its proper divisors (19377545160136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12666541937796 is a wasteful number, since it uses less digits than its factorization.

12666541937796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284438100 (or 284438095 counting only the distinct ones).

The product of its digits is 617258880, while the sum is 72.

The spelling of 12666541937796 in words is "twelve trillion, six hundred sixty-six billion, five hundred forty-one million, nine hundred thirty-seven thousand, seven hundred ninety-six".