166066111 has 4 divisors (see below), whose sum is σ = 166755424. Its totient is φ = 165376800.

The previous prime is 166066063. The next prime is 166066123. The reversal of 166066111 is 111660661.

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 166066111 - 2⁷ = 166065983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166066111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166066171) 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, 344295 + ... + 344776.

It is an arithmetic number, because the mean of its divisors is an integer number (41688856).

Almost surely, 2^166066111 is an apocalyptic number.

166066111 is a deficient number, since it is larger than the sum of its proper divisors (689313).

166066111 is an equidigital number, since it uses as much as digits as its factorization.

166066111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689312.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 166066111 is about 12886.6640757024. The cubic root of 166066111 is about 549.6594155848.

The spelling of 166066111 in words is "one hundred sixty-six million, sixty-six thousand, one hundred eleven".