166630111 has 4 divisors (see below), whose sum is σ = 167084512. Its totient is φ = 166175712.

The previous prime is 166630069. The next prime is 166630151. The reversal of 166630111 is 111036661.

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 166630111 - 2⁹ = 166629599 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 (166630151) 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, 226650 + ... + 227383.

It is an arithmetic number, because the mean of its divisors is an integer number (41771128).

Almost surely, 2^166630111 is an apocalyptic number.

166630111 is a deficient number, since it is larger than the sum of its proper divisors (454401).

166630111 is an equidigital number, since it uses as much as digits as its factorization.

166630111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454400.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 166630111 is about 12908.5286148345. The cubic root of 166630111 is about 550.2809704898.

Adding to 166630111 its reverse (111036661), we get a palindrome (277666772).

The spelling of 166630111 in words is "one hundred sixty-six million, six hundred thirty thousand, one hundred eleven".