166421134 has 16 divisors (see below), whose sum is σ = 275025456. Its totient is φ = 74896000.

The previous prime is 166421119. The next prime is 166421147. The reversal of 166421134 is 431124661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35227 + ... + 39670.

It is an arithmetic number, because the mean of its divisors is an integer number (17189091).

Almost surely, 2^166421134 is an apocalyptic number.

166421134 is a deficient number, since it is larger than the sum of its proper divisors (108604322).

166421134 is a wasteful number, since it uses less digits than its factorization.

166421134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75011.

The product of its digits is 3456, while the sum is 28.

The square root of 166421134 is about 12900.4315431694. The cubic root of 166421134 is about 550.0508316656.

Adding to 166421134 its reverse (431124661), we get a palindrome (597545795).

The spelling of 166421134 in words is "one hundred sixty-six million, four hundred twenty-one thousand, one hundred thirty-four".