Is there a number which, when written as a word has same number of letters as its numerical value?

Why this works

This riddle plays with the relationship between numbers and the words that represent them. The number "four" is the answer because when you spell it out, it contains exactly four letters: F-O-U-R. This clever coincidence is what makes it special – it’s the only number under ten that fits this criterion, showcasing the fun connection between language and mathematics!