12666728059 has 2 divisors, whose sum is σ = 12666728060. Its totient is φ = 12666728058.

The previous prime is 12666728047. The next prime is 12666728069. The reversal of 12666728059 is 95082766621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12666728059 - 2⁵ = 12666728027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12666727997 and 12666728015.

It is not a weakly prime, because it can be changed into another prime (12666728069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6333364029 + 6333364030.

It is an arithmetic number, because the mean of its divisors is an integer number (6333364030).

Almost surely, 2^12666728059 is an apocalyptic number.

12666728059 is a deficient number, since it is larger than the sum of its proper divisors (1).

12666728059 is an equidigital number, since it uses as much as digits as its factorization.

12666728059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 12666728059 in words is "twelve billion, six hundred sixty-six million, seven hundred twenty-eight thousand, fifty-nine".