166004404 has 12 divisors (see below), whose sum is σ = 291536224. Its totient is φ = 82708344.

The previous prime is 166004393. The next prime is 166004413. The reversal of 166004404 is 404400661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72192 + ... + 74455.

Almost surely, 2^166004404 is an apocalyptic number.

It is an amenable number.

166004404 is a deficient number, since it is larger than the sum of its proper divisors (125531820).

166004404 is a wasteful number, since it uses less digits than its factorization.

166004404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146934 (or 146932 counting only the distinct ones).

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

The square root of 166004404 is about 12884.2696339373. The cubic root of 166004404 is about 549.5913261649.

The spelling of 166004404 in words is "one hundred sixty-six million, four thousand, four hundred four".