1666850016685 has 32 divisors (see below), whose sum is σ = 2288275771392. Its totient is φ = 1141828522560.

The previous prime is 1666850016679. The next prime is 1666850016703. The reversal of 1666850016685 is 5866100586661.

It is a de Polignac number, because none of the positive numbers 2^k-1666850016685 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177263194 + ... + 177272596.

It is an arithmetic number, because the mean of its divisors is an integer number (71508617856).

Almost surely, 2^{1666850016685} is an apocalyptic number.

It is an amenable number.

1666850016685 is a deficient number, since it is larger than the sum of its proper divisors (621425754707).

1666850016685 is a wasteful number, since it uses less digits than its factorization.

1666850016685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13993.

The product of its (nonzero) digits is 12441600, while the sum is 58.

The spelling of 1666850016685 in words is "one trillion, six hundred sixty-six billion, eight hundred fifty million, sixteen thousand, six hundred eighty-five".