66105166 has 4 divisors (see below), whose sum is σ = 99157752. Its totient is φ = 33052582.

The previous prime is 66105157. The next prime is 66105167. The reversal of 66105166 is 66150166.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66105167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16526290 + ... + 16526293.

It is an arithmetic number, because the mean of its divisors is an integer number (24789438).

Almost surely, 2^66105166 is an apocalyptic number.

66105166 is a deficient number, since it is larger than the sum of its proper divisors (33052586).

66105166 is a wasteful number, since it uses less digits than its factorization.

66105166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33052585.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 66105166 is about 8130.5083481908. The cubic root of 66105166 is about 404.3385351491.

The spelling of 66105166 in words is "sixty-six million, one hundred five thousand, one hundred sixty-six".