noun, noun which may take the genitive case particle 'no'
sixth
Ordinal number 'sixth', used in formal or numbered lists, titles, and classifications. Often followed by a noun with の.
第六回の会議は来週です。
The sixth meeting is next week.
彼は第六感が鋭い。
He has a sharp sixth sense.
More colloquial and common in everyday counting; 第六 is more formal and often used in official names or numbered series.
Compound of prefix 第 (ordinal marker) and 六 (six).