I don't recall the reference, but I read once in a work of Hardy's that "number-theoretic" should not be used when talking about number theory, however tempting it may be.
So what do we say? I read on Wikipedia that the word "arithmetical" is preferred.
Is "number-theoretical" wrong? Is "arithmetical" the correct word to use? Recently I've been looking into the Number Theoretical Transform (NNT). Ought this be called the "Arithmetical Transform" instead?