Yes, it's one of the more interesting aspects of English grammar.

There are a few 'number-transparent' nouns. These are the main ones:

"lot", "lots", "remainder", "number", "plenty", "bags", "rest", "couple",
"heaps", "loads", "oodles", "stacks".

Some of those, for example, "number" and "couple" select only plural heads.




PaulM