166564422 has 12 divisors (see below), whose sum is σ = 360889620. Its totient is φ = 55521468.

The previous prime is 166564421. The next prime is 166564471. The reversal of 166564422 is 224465661.

166564422 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 644 + 2 + 2 = 666.

166564422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166564421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4626772 + ... + 4626807.

It is an arithmetic number, because the mean of its divisors is an integer number (30074135).

Almost surely, 2^166564422 is an apocalyptic number.

166564422 is an abundant number, since it is smaller than the sum of its proper divisors (194325198).

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

166564422 is a wasteful number, since it uses less digits than its factorization.

166564422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9253587 (or 9253584 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 166564422 is about 12905.9839609384. The cubic root of 166564422 is about 550.2086503121.

The spelling of 166564422 in words is "one hundred sixty-six million, five hundred sixty-four thousand, four hundred twenty-two".