1666666835023 has 2 divisors, whose sum is σ = 1666666835024. Its totient is φ = 1666666835022.

The previous prime is 1666666834997. The next prime is 1666666835039. The reversal of 1666666835023 is 3205386666661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1666666835023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1666666835123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833333417511 + 833333417512.

It is an arithmetic number, because the mean of its divisors is an integer number (833333417512).

Almost surely, 2^{1666666835023} is an apocalyptic number.

1666666835023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1666666835023 is an equidigital number, since it uses as much as digits as its factorization.

1666666835023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33592320, while the sum is 58.

The spelling of 1666666835023 in words is "one trillion, six hundred sixty-six billion, six hundred sixty-six million, eight hundred thirty-five thousand, twenty-three".