166606111 has 8 divisors (see below), whose sum is σ = 191797920. Its totient is φ = 141762048.

The previous prime is 166606087. The next prime is 166606127. The reversal of 166606111 is 111606661.

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 166606111 - 2²⁵ = 133051679 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 166606111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166609111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85906 + ... + 87823.

It is an arithmetic number, because the mean of its divisors is an integer number (23974740).

Almost surely, 2^166606111 is an apocalyptic number.

166606111 is a deficient number, since it is larger than the sum of its proper divisors (25191809).

166606111 is a wasteful number, since it uses less digits than its factorization.

166606111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173873.

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

The square root of 166606111 is about 12907.5989634014. The cubic root of 166606111 is about 550.2545499401.

The spelling of 166606111 in words is "one hundred sixty-six million, six hundred six thousand, one hundred eleven".