173428666 has 8 divisors (see below), whose sum is σ = 263277504. Its totient is φ = 85669500.

The previous prime is 173428643. The next prime is 173428687. The reversal of 173428666 is 666824371.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 522210 + ... + 522541.

It is an arithmetic number, because the mean of its divisors is an integer number (32909688).

Almost surely, 2^173428666 is an apocalyptic number.

173428666 is a deficient number, since it is larger than the sum of its proper divisors (89848838).

173428666 is a wasteful number, since it uses less digits than its factorization.

173428666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044836.

The product of its digits is 290304, while the sum is 43.

The square root of 173428666 is about 13169.2317923256. The cubic root of 173428666 is about 557.6653076118.

The spelling of 173428666 in words is "one hundred seventy-three million, four hundred twenty-eight thousand, six hundred sixty-six".