A co-worker told me, yesterday, that he noticed that most shuls tend to have more Cohanim than Levi'im. He says that seems strange.
I can't say for what occurs in shuls, but, he did conclude that there would have had to have been fewer Cohanim than Levi'im, at least at the time B'nai Yisra'el entered the land of Cana'an.
Parshat Pinchas indicates the last census taken by Moshe and Elazar of those who survived the 40 years in the desert. We have a census of Levi'im above age 20, and there was obviously more than that under that age. However, only descendants of Aharon were considered Cohanim, which is a rather small percentage of that number.
Has any commentary or anyone else calculated how many Cohanim were around?