12642666024827 has 4 divisors (see below), whose sum is σ = 12646470622200. Its totient is φ = 12638861427456.

The previous prime is 12642666024749. The next prime is 12642666024881. The reversal of 12642666024827 is 72842066624621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12642666024827 - 2²² = 12642661830523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12642666024887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1902293702 + ... + 1902300347.

It is an arithmetic number, because the mean of its divisors is an integer number (3161617655550).

Almost surely, 2^{12642666024827} is an apocalyptic number.

12642666024827 is a deficient number, since it is larger than the sum of its proper divisors (3804597373).

12642666024827 is an equidigital number, since it uses as much as digits as its factorization.

12642666024827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3804597372.

The product of its (nonzero) digits is 18579456, while the sum is 56.

The spelling of 12642666024827 in words is "twelve trillion, six hundred forty-two billion, six hundred sixty-six million, twenty-four thousand, eight hundred twenty-seven".