I have a question: What is the best number of all and it is famous

Uh

I realized every perfect number are triangles except the odd perfect number.

𝐖𝐡𝐚𝐭 𝐚𝐫𝐞 𝐭𝐡𝐨𝐬𝐞 *𝐝𝐢𝐧𝐠𝐬 𝟑 𝐭𝐢𝐦𝐞𝐬*?