12766643702 has 4 divisors (see below), whose sum is σ = 19149965556. Its totient is φ = 6383321850.

The previous prime is 12766643677. The next prime is 12766643711. The reversal of 12766643702 is 20734666721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20734666721 = 797 ⋅26015893.

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, 3191660924 + ... + 3191660927.

It is an arithmetic number, because the mean of its divisors is an integer number (4787491389).

Almost surely, 2^12766643702 is an apocalyptic number.

12766643702 is a deficient number, since it is larger than the sum of its proper divisors (6383321854).

12766643702 is an equidigital number, since it uses as much as digits as its factorization.

12766643702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6383321853.

The product of its (nonzero) digits is 508032, while the sum is 44.

The spelling of 12766643702 in words is "twelve billion, seven hundred sixty-six million, six hundred forty-three thousand, seven hundred two".