I understand that 666 is -rw-rw-rw- but is it also a-w? I don't understand that part.
I'm just trying to change the chmod in ftp instead of the command line.
a+w adds write ability to user, group, and other.
a-w removes write ablility from user, group and other.
"alphabet" format modifies permissions of existing files, while the "numeric" format overwrites permissions.
See chmod(1): [hmug.org...]