166666684807 has 8 divisors (see below), whose sum is σ = 191179077632. Its totient is φ = 142330008600.

The previous prime is 166666684747. The next prime is 166666684817. The reversal of 166666684807 is 708486666661.

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

It is a cyclic number.

It is not a de Polignac number, because 166666684807 - 2¹⁵ = 166666652039 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 (166666684817) 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, 43927119 + ... + 43930912.

It is an arithmetic number, because the mean of its divisors is an integer number (23897384704).

Almost surely, 2^166666684807 is an apocalyptic number.

166666684807 is a deficient number, since it is larger than the sum of its proper divisors (24512392825).

166666684807 is an equidigital number, since it uses as much as digits as its factorization.

166666684807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87858309.

The product of its (nonzero) digits is 83607552, while the sum is 64.

The spelling of 166666684807 in words is "one hundred sixty-six billion, six hundred sixty-six million, six hundred eighty-four thousand, eight hundred seven".