בְּנֵי־דְלָיָ֥ה בְנֵי־טוֹבִיָּ֖ה בְּנֵ֣י נְקוֹדָ֑א שֵׁ֥שׁ מֵא֖וֹת חֲמִשִּׁ֥ים וּשְׁנָֽיִם׃ (ס)
the children of Delaiah, the children of Tobiah, the children of Nekoda, six hundred fifty and two.
Read kabbalistic (mystical) interpretation of Ezra 2:60: and classical mystical sources.