166666648111111 has 4 divisors (see below), whose sum is σ = 171171152114152. Its totient is φ = 162162144108072.

The previous prime is 166666648111079. The next prime is 166666648111123. The reversal of 166666648111111 is 111111846666661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166666648111111 - 2⁵ = 166666648111079 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 (166666648111511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2252252001465 + ... + 2252252001538.

It is an arithmetic number, because the mean of its divisors is an integer number (42792788028538).

Almost surely, 2^{166666648111111} is an apocalyptic number.

166666648111111 is a deficient number, since it is larger than the sum of its proper divisors (4504504003041).

166666648111111 is an equidigital number, since it uses as much as digits as its factorization.

166666648111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4504504003040.

The product of its digits is 1492992, while the sum is 55.

The spelling of 166666648111111 in words is "one hundred sixty-six trillion, six hundred sixty-six billion, six hundred forty-eight million, one hundred eleven thousand, one hundred eleven".