166004224 has 40 divisors (see below), whose sum is σ = 335503080. Its totient is φ = 82046976.

The previous prime is 166004191. The next prime is 166004239. The reversal of 166004224 is 422400661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43747 + ... + 47389.

It is an arithmetic number, because the mean of its divisors is an integer number (8387577).

Almost surely, 2^166004224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166004224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167751540).

166004224 is an abundant number, since it is smaller than the sum of its proper divisors (169498856).

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

166004224 is an frugal number, since it uses more digits than its factorization.

166004224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3750 (or 3734 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 166004224 is about 12884.2626486734. The cubic root of 166004224 is about 549.5911275226.

Adding to 166004224 its reverse (422400661), we get a palindrome (588404885).

The spelling of 166004224 in words is "one hundred sixty-six million, four thousand, two hundred twenty-four".