66164166 has 24 divisors (see below), whose sum is σ = 143537160. Its totient is φ = 22026816.

The previous prime is 66164141. The next prime is 66164179. The reversal of 66164166 is 66146166.

66164166 is a `hidden beast` number, since 6 + 6 + 1 + 641 + 6 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 66164166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16341 + ... + 19983.

It is an arithmetic number, because the mean of its divisors is an integer number (5980715).

Almost surely, 2^66164166 is an apocalyptic number.

66164166 is an abundant number, since it is smaller than the sum of its proper divisors (77372994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66164166 is a wasteful number, since it uses less digits than its factorization.

66164166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4660 (or 4657 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 66164166 is about 8134.1358483861. The cubic root of 66164166 is about 404.4587924161.

The spelling of 66164166 in words is "sixty-six million, one hundred sixty-four thousand, one hundred sixty-six".