Comment on SEO Domain Name by SEO Dave.
From a Google SEO perspective you won’t get a boost because your domain includes a number, so no SEO boost for number per se.
Exception is if you are specifically targeting a number SERP, fop example “top 10 SEO tips” type SERPs: 10-something.tld would get a boost for the number 10 sitewide so that type of domain would help.
However, if you use a domain like 10keyword.tld you won’t get a boost for keyword, you’ll get a boost for 10keyword, which isn’t a SERP unless 10keyword is a SERP like bet365 is a SERP (popular online gambling site).
I’m aware the Chinese give a lot of value to numbers, they have lucky Chinese numbers like the number 8 and understand some will pay a lot of money to acquire things with a lucky number. Not a clue about specifics though.
Quick Google search:
The domain name 1001.com sold for $100,000.
Frank Schilling’s Name Administration sold 88888.com for $245,000.
114.com sold in early 2013 for 2.1 million dollars, getting in the top 5 disclosed transactions in 2013.
55.com to this date is the numeric domain sold at a highest price – $2.3 million in 2011.
Clearly there’s a market, not my type of thing to try to tap into.