166630326 has 16 divisors (see below), whose sum is σ = 337955328. Its totient is φ = 54761000.

The previous prime is 166630307. The next prime is 166630327. The reversal of 166630326 is 623036661.

It is a happy number.

It is a Smith number, since the sum of its digits (33) 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 (166630327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195150 + ... + 196001.

It is an arithmetic number, because the mean of its divisors is an integer number (21122208).

Almost surely, 2^166630326 is an apocalyptic number.

166630326 is an abundant number, since it is smaller than the sum of its proper divisors (171325002).

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

166630326 is a wasteful number, since it uses less digits than its factorization.

166630326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391227.

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 166630326 is about 12908.5369426593. The cubic root of 166630326 is about 550.2812071625.

Adding to 166630326 its reverse (623036661), we get a palindrome (789666987).

The spelling of 166630326 in words is "one hundred sixty-six million, six hundred thirty thousand, three hundred twenty-six".