66112189 has 16 divisors (see below), whose sum is σ = 81051264. Its totient is φ = 53064000.

The previous prime is 66112187. The next prime is 66112219. The reversal of 66112189 is 98121166.

It is not a de Polignac number, because 66112189 - 2¹ = 66112187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66112187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6762 + ... + 13339.

It is an arithmetic number, because the mean of its divisors is an integer number (5065704).

Almost surely, 2^66112189 is an apocalyptic number.

It is an amenable number.

66112189 is a deficient number, since it is larger than the sum of its proper divisors (14939075).

66112189 is a wasteful number, since it uses less digits than its factorization.

66112189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20148.

The product of its digits is 5184, while the sum is 34.

The square root of 66112189 is about 8130.9402285345. The cubic root of 66112189 is about 404.3528535912.

The spelling of 66112189 in words is "sixty-six million, one hundred twelve thousand, one hundred eighty-nine".