G0706
ἀριθμός
number
ἀριθμός, -οῦ, ὁ [in LXX chiefly for מִסְפָּר ;] number, a number: Luk.22:3, Jhn.6:10, Act.4:4 5:36 6:7 11:21 16:5, Rom.9:27, Rev.5:11 7:4 9:16 13:17-18 15:2 20:8 (for exx. of mystical use in π., see MM, see word).† (AS)
Full Thayer's lexicon entry
ἀριθμός — arithmós
ἀριθμός, ἀριθμοῦ, ὁ (from Homer down), a number;
a. a fixed and definite number: τόν ἀριθμόν πεντακισχίλιοι, in number, Joh 6:10 (2Ma 8:16; 3Ma 5:2, and often in Greek writings; Winers Grammar, 230 (216); (Buttmann, 153 (134))); ἐκ τοῦ ἀριθμοῦ τῶν δώδεκα, Luk 22:3; ἀριθμός... ἀνθρώπου, a number whose letters indicate a certain man, Rev 13:18.
b. an indefinite number, equivalent to a multitude: Act 6:7; Act 11:21; Rev 20:8.
16 occurrences
Luke (1), John (1), Acts (5), Romans (1), Revelation of John (8)