12666923497544 has 8 divisors (see below), whose sum is σ = 23750481557910. Its totient is φ = 6333461748768.

The previous prime is 12666923497531. The next prime is 12666923497621. The reversal of 12666923497544 is 44579432966621.

It can be written as a sum of positive squares in only one way, i.e., 8666323475044 + 4000600022500 = 2943862^2 + 2000150^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 791682718589 + ... + 791682718604.

Almost surely, 2^{12666923497544} is an apocalyptic number.

It is an amenable number.

12666923497544 is a deficient number, since it is larger than the sum of its proper divisors (11083558060366).

12666923497544 is a wasteful number, since it uses less digits than its factorization.

12666923497544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583365437199 (or 1583365437195 counting only the distinct ones).

The product of its digits is 470292480, while the sum is 68.

The spelling of 12666923497544 in words is "twelve trillion, six hundred sixty-six billion, nine hundred twenty-three million, four hundred ninety-seven thousand, five hundred forty-four".