I'm not a native speaker, and my teacher taught me to use "the biggest number of . . ." when comparing amounts of some things, but I've checked it in google which seems like "the largest, the greatest, the highest, and even the most number of. . ." are actually used more often. 1. Which do we usually use for comparing numbers or amounts of some ... More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.