166666684886 has 8 divisors (see below), whose sum is σ = 269230798704. Its totient is φ = 76923085320.

The previous prime is 166666684871. The next prime is 166666684907. The reversal of 166666684886 is 688486666661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3205128530 + ... + 3205128581.

It is an arithmetic number, because the mean of its divisors is an integer number (33653849838).

Almost surely, 2^166666684886 is an apocalyptic number.

166666684886 is a deficient number, since it is larger than the sum of its proper divisors (102564113818).

166666684886 is a wasteful number, since it uses less digits than its factorization.

166666684886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6410257126.

The product of its digits is 573308928, while the sum is 71.

The spelling of 166666684886 in words is "one hundred sixty-six billion, six hundred sixty-six million, six hundred eighty-four thousand, eight hundred eighty-six".