This is the 1968th most frequent Russian word.
сотен
The word "сотен" is the genitive plural form of "сотня," meaning "hundred" in English.
Here, "сотен" is used in the genitive plural form to denote a quantity exceeding 'hundreds'.
В его коллекции было более сотен марок.
His collection contained more than hundreds of stamps.
In this sentence, "сотен" is again in the genitive plural, paired with 'несколько' indicating a specific quantity of hundreds.
Стоимость этой работы всего несколько сотен рублей.
The cost of this work is just a few hundreds of rubles.
"Сотен" in this context is employed in the genitive case to signify a large count of items, integrated as the direct object of the verb "приготовили".