Wordpress folders should be 755 and files should be 644.
https://codex.wordpress.org/Changing_File_Permissions
https://codex.wordpress.org/Hardening_WordPress
On command-line you can use:
find /path/to/your/wordpress/install/ -type d -exec chmod 755 {} \;
find /path/to/your/wordpress/install/ -type f -exec chmod 644 {} \;