The towels of the hotel = the hotel's towels.
The possessive form is the hotel's towels.
The hotel's towels are nice
The possessive form is 'the hotel's towels'.
The towels of the hotel = the hotel'stowels.
The sentence "the towels of the hotels" contains no possessive noun. If however you rewrite the sentence as "the hotels' towels" then the possessive noun is hotels'.
The possessive form for the noun hotel is hotel's.Example: The hotel's location is perfect.
The towels of the hotels (plural towels and plural hotels) is the hotels' towels.
The towels of the hotels (plural towels and plural hotels) is the hotels' towels.
There is no collective noun specifically for towels, you use a collective appropriate for the circumstance. Some examples are 'a stack of towels', 'a row of towels', 'a basket of towels', or 'an array of towels'.
The possessive singular noun is explorer's. The possessive plural noun is explorers'.
The possessive form for the noun coyote is coyote's.
The possessive noun of "preacher" is "preacher's."