A very specific stringset of numbers. 7633 and 14, both because of characters from Devil Summoner: Raidou Kuzunoha. The former (7633) is a pun in Japanese and the latter (14) is the number of the titular character.

7 = (Na)na
6 = (Ro)ku
3 = (Mi)ttsu Based on the Native Japanese counting system
3 = (San) Chinese-derived counting system
Spoken aloud, it is a pun on Narumi-san. Shouhei Narumi from DSRK.