Installing npm package fails with 404

Using the command prompt, I am trying to install angular CLI and it fails. I have npm version 5.5.1 and node version v8.9.1. I am trying to install angular cli using the command

npm install -g @angular/[email protected]

and it fails with the error:

npm ERR! code E404
npm ERR! 404 Not Found: @angular/[email protected]
npm ERR! A complete log of this run can be found in:

I look at the log file and I see its trying to fetch the package from a location that doesn’t exist. Not sure from where it gets pulled. How do I fix this location path and install angular cli. Same happens when I try to install typescript or any other npm package. all of them try to install from the location mentioned below and it fails with 404

8 http fetch GET 404 
       http://nuget.feed.xyz.corp:8729/npm/FeedNPM/@angular%2fcli 109ms
9 silly fetchPackageMetaData error for @angular/[email protected] 404 Not Found: 
     @angular/[email protected]
10 verbose stack Error: 404 Not Found: @angular/[email protected]