I’ve read the agreement and I do not see a withdrawal limit in regard to a number. It’s in the app when setup, but I can’t find an external link yet. Here are several important parts. I hope this helps.
Restrictions on Withdrawal Methods
You are not permitted to register your Account under a credit, debit, gift, or other type of card issued by a third party or another bank. You are not permitted to make withdrawals from your Account by creating a check issued by a third party and drawn on your Account. If you attempt to make any transactions through any of these payment methods, we will reject or return the transaction without notice to you and may consider such action to be a violation of this Agreement.