וַיְהִי֙ מִשְׁקַ֣ל הַזָּהָ֔ב אֲשֶׁר־בָּ֥א לִשְׁלֹמֹ֖ה בְּשָׁנָ֣ה אֶחָ֑ת שֵׁ֥שׁ מֵא֛וֹת וְשִׁשִּׁ֥ים וָשֵׁ֖שׁ כִּכְּרֵ֥י זָהָֽב׃
Now the weight of gold that came to Solomon in one year was six hundred and threescore and six talents of gold;
Read midrashic interpretation of II Chronicles 9:13: and classical rabbinic exegesis.