Do you have the backup of your content Database which are attached to web app(deleted) if yes.
1) from central admin create new Web Application and mention the same port(6666).
2) configure the Web Application settings i.e object cache settings, adding appPool account to USer Profile, AAM etc.
3) now detach the Content DB you created during the web application process and attach the old content DB.
You all set, you have everything back.
You should check the SQL Server, may be Content DB still there and you dont need to restore it.