1666666000079 has 2 divisors, whose sum is σ = 1666666000080. Its totient is φ = 1666666000078.

The previous prime is 1666666000063. The next prime is 1666666000133. The reversal of 1666666000079 is 9700006666661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1666666000079 - 2⁴ = 1666666000063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1666666005079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833333000039 + 833333000040.

It is an arithmetic number, because the mean of its divisors is an integer number (833333000040).

Almost surely, 2^{1666666000079} is an apocalyptic number.

1666666000079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1666666000079 is an equidigital number, since it uses as much as digits as its factorization.

1666666000079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2939328, while the sum is 53.

The spelling of 1666666000079 in words is "one trillion, six hundred sixty-six billion, six hundred sixty-six million, seventy-nine", and thus it is an aban number.