1666666835185 has 16 divisors (see below), whose sum is σ = 2296650951360. Its totient is φ = 1148325474240.

The previous prime is 1666666835177. The next prime is 1666666835219. The reversal of 1666666835185 is 5815386666661.

It is not a de Polignac number, because 1666666835185 - 2³ = 1666666835177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1666666835185.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 797447202 + ... + 797449291.

It is an arithmetic number, because the mean of its divisors is an integer number (143540684460).

Almost surely, 2^{1666666835185} is an apocalyptic number.

It is an amenable number.

1666666835185 is a deficient number, since it is larger than the sum of its proper divisors (629984116175).

1666666835185 is a wasteful number, since it uses less digits than its factorization.

1666666835185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594896528.

The product of its digits is 223948800, while the sum is 67.

The spelling of 1666666835185 in words is "one trillion, six hundred sixty-six billion, six hundred sixty-six million, eight hundred thirty-five thousand, one hundred eighty-five".