166666666686 has 48 divisors (see below), whose sum is σ = 361062665856. Its totient is φ = 51265582368.

The previous prime is 166666666669. The next prime is 166666666709. The reversal of 166666666686 is 686666666661.

It is a self number, because there is not a number n which added to its sum of digits gives 166666666686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3344791 + ... + 3394253.

It is an arithmetic number, because the mean of its divisors is an integer number (7522138872).

Almost surely, 2^166666666686 is an apocalyptic number.

166666666686 is an abundant number, since it is smaller than the sum of its proper divisors (194395999170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166666666686 is a wasteful number, since it uses less digits than its factorization.

166666666686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52817 (or 52804 counting only the distinct ones).

The product of its digits is 483729408, while the sum is 69.

The spelling of 166666666686 in words is "one hundred sixty-six billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred eighty-six".