99 — doubly long in time, hence eternal; used in the name of a popular Chinese-American supermarket chain, 99 Ranch Market.
168 — road of prosperity or to be prosperous together — many premium-pay telephone numbers in China begin with this number. It is also the name of a motel chain in China (Motel 168).
518 — I will prosper, other variations include: 5189 (I will prosper for a long time), 516289 (I will get on a long, smooth prosperous road) and 5918 (I will soon prosper)
814 — Similar to 168, this means "I will be wealthy my entire life". 148 also implies the same meaning.
888 — Three times the prosperity.
1314 — whole lifetime, existence.
1一 — sure
2二 — easy
3三 — live
4四 — considered unlucky since the pronunciation of 4 (sì ) sounds like the word for death or suffering (sǐ ).
5五 — the self, me, myself, nothing, never
6六 — easy and smooth, all the way.
7七 — a slang/vulgar word in Cantonese.
8八 — sudden fortune, prosperity
9九 — long in time, a slang/vulgar word in Cantonese