Drupal File Permissions

What are drupal's recommended file permissions?

According to the drupal documentation:

File Permissions in a Nutshell

/default on 755
/default/files including all subfolders and files on 744 (or 755)
/default/themes including all subfolders and files on 755
/default/modules including all subfolders and files on 755
/default/settings.php and /default/default.settings.php on 444

• 755 is shorthand for 'rwxr-xr-x'. Translation: full access for the owner, everyone else has read and execute access

• 664 is shorthand for 'rw-rw-r--'. Translation: the owner and the group get read and write access, all other users get read access.

Be sure to take a look at the documentation over on drupal.org for tons more information.