166666116615111 has 32 divisors (see below), whose sum is σ = 248038368112640. Its totient is φ = 110604296988000.

The previous prime is 166666116615091. The next prime is 166666116615127. The reversal of 166666116615111 is 111516611666661.

It is not a de Polignac number, because 166666116615111 - 2⁵ = 166666116615079 is a prime.

It is a super-2 number, since 2×166666116615111² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166666116615511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80813061 + ... + 82849761.

It is an arithmetic number, because the mean of its divisors is an integer number (7751199003520).

Almost surely, 2^{166666116615111} is an apocalyptic number.

166666116615111 is a deficient number, since it is larger than the sum of its proper divisors (81372251497529).

166666116615111 is a wasteful number, since it uses less digits than its factorization.

166666116615111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050524 (or 2050518 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 54.

The spelling of 166666116615111 in words is "one hundred sixty-six trillion, six hundred sixty-six billion, one hundred sixteen million, six hundred fifteen thousand, one hundred eleven".