166666669867 has 8 divisors (see below), whose sum is σ = 180180184400. Its totient is φ = 153627313824.

The previous prime is 166666669831. The next prime is 166666669909. The reversal of 166666669867 is 768966666661.

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

It is not a de Polignac number, because 166666669867 - 2⁷ = 166666669739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166666669867.

It is not an unprimeable number, because it can be changed into a prime (166666669667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118538892 + ... + 118540297.

It is an arithmetic number, because the mean of its divisors is an integer number (22522523050).

Almost surely, 2^166666669867 is an apocalyptic number.

166666669867 is a deficient number, since it is larger than the sum of its proper divisors (13513514533).

166666669867 is a wasteful number, since it uses less digits than its factorization.

166666669867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237079245.

The product of its digits is 846526464, while the sum is 73.

The spelling of 166666669867 in words is "one hundred sixty-six billion, six hundred sixty-six million, six hundred sixty-nine thousand, eight hundred sixty-seven".