166445226 has 32 divisors (see below), whose sum is σ = 372113280. Its totient is φ = 55146528.

The previous prime is 166445221. The next prime is 166445233. The reversal of 166445226 is 622544661.

166445226 is a `hidden beast` number, since 1 + 6 + 644 + 5 + 2 + 2 + 6 = 666.

166445226 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (166445221) 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, 211 + ... + 18246.

It is an arithmetic number, because the mean of its divisors is an integer number (11628540).

Almost surely, 2^166445226 is an apocalyptic number.

166445226 is an abundant number, since it is smaller than the sum of its proper divisors (205668054).

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

166445226 is a wasteful number, since it uses less digits than its factorization.

166445226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18635 (or 18629 counting only the distinct ones).

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

The square root of 166445226 is about 12901.3652765899. The cubic root of 166445226 is about 550.0773731368.

Adding to 166445226 its reverse (622544661), we get a palindrome (788989887).

The spelling of 166445226 in words is "one hundred sixty-six million, four hundred forty-five thousand, two hundred twenty-six".