12621566066126 has 4 divisors (see below), whose sum is σ = 18932349099192. Its totient is φ = 6310783033062.

The previous prime is 12621566066111. The next prime is 12621566066147. The reversal of 12621566066126 is 62166066512621.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3155391516530 + ... + 3155391516533.

It is an arithmetic number, because the mean of its divisors is an integer number (4733087274798).

Almost surely, 2^{12621566066126} is an apocalyptic number.

12621566066126 is a deficient number, since it is larger than the sum of its proper divisors (6310783033066).

12621566066126 is an equidigital number, since it uses as much as digits as its factorization.

12621566066126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6310783033065.

The product of its (nonzero) digits is 1866240, while the sum is 50.

The spelling of 12621566066126 in words is "twelve trillion, six hundred twenty-one billion, five hundred sixty-six million, sixty-six thousand, one hundred twenty-six".