16662173 has 8 divisors (see below), whose sum is σ = 18668640. Its totient is φ = 14737680.

The previous prime is 16662169. The next prime is 16662179. The reversal of 16662173 is 37126661.

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

It is a cyclic number.

It is not a de Polignac number, because 16662173 - 2² = 16662169 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16662179) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 20063 + ... + 20876.

It is an arithmetic number, because the mean of its divisors is an integer number (2333580).

Almost surely, 2^16662173 is an apocalyptic number.

It is an amenable number.

16662173 is a deficient number, since it is larger than the sum of its proper divisors (2006467).

16662173 is a wasteful number, since it uses less digits than its factorization.

16662173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40987.

The product of its digits is 9072, while the sum is 32.

The square root of 16662173 is about 4081.9325080163. The cubic root of 16662173 is about 255.4135184733.

The spelling of 16662173 in words is "sixteen million, six hundred sixty-two thousand, one hundred seventy-three".