1,002,000,000,000/Historical Note

Historical Note on $1 \, 002 \, 000 \, 000 \, 000$
According to Plutarch, $1 \, 002 \, 000 \, 000 \, 000$ was the number of possible syllables that calculated as the number of syllables that could be made from the letters of the Greek alphabet.

If this is true, then it forms the first attempt on record at solving a significant problem of combinatorics.