七百七十七：ななひゃくななじゅうなな。 [nana-hyaku-nana-juu-nana] Seven-hundred and seventy and seven. To say "seven seven seven" one can say 「しち・しち・しち」[shi-chi shi-chi shi-chi] or [nana-nana-nana] 「なな・なな・なな」七・七・七 in kanji.