166704728 has 8 divisors (see below), whose sum is σ = 312571380. Its totient is φ = 83352360.

The previous prime is 166704691. The next prime is 166704781. The reversal of 166704728 is 827407661.

166704728 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10419038 + ... + 10419053.

Almost surely, 2^166704728 is an apocalyptic number.

It is an amenable number.

166704728 is a deficient number, since it is larger than the sum of its proper divisors (145866652).

166704728 is a wasteful number, since it uses less digits than its factorization.

166704728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20838097 (or 20838093 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 166704728 is about 12911.4185123092. The cubic root of 166704728 is about 550.3630968785.

The spelling of 166704728 in words is "one hundred sixty-six million, seven hundred four thousand, seven hundred twenty-eight".