166850011685 has 16 divisors (see below), whose sum is σ = 228925270656. Its totient is φ = 114360237888.

The previous prime is 166850011681. The next prime is 166850011693. The reversal of 166850011685 is 586110058661.

It is a cyclic number.

It is not a de Polignac number, because 166850011685 - 2² = 166850011681 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166850011681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 987227 + ... + 1143816.

It is an arithmetic number, because the mean of its divisors is an integer number (14307829416).

Almost surely, 2^166850011685 is an apocalyptic number.

It is an amenable number.

166850011685 is a deficient number, since it is larger than the sum of its proper divisors (62075258971).

166850011685 is a wasteful number, since it uses less digits than its factorization.

166850011685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133292.

The product of its (nonzero) digits is 345600, while the sum is 47.

The spelling of 166850011685 in words is "one hundred sixty-six billion, eight hundred fifty million, eleven thousand, six hundred eighty-five".