頂 is built from the 丁 and 頁 (page / head) components.
It reads チョウ like 丁, as do 庁, 訂, and 町 — learn 丁 once and the family's reading comes with it.
A common word using 頂 is 頂上 (ちょうじょう), meaning “top, summit, peak”.
Kanji that look similar include 貯 and 訂.
