how can i get my apple card credit card number

Please review the information at the support article linked below.

How to find the card numbers associated with your Apple Card - Apple Support

>>Find your virtual card number, security code, and expiration date

To make purchases online with Apple Card where Apple Pay isn't accepted yet, use your virtual card number. You can find your virtual card number on a compatible iPhone, iPad, or Apple Watch with the latest version of iOS, iPadOS, or watchOS. You can also see the last four digits of your titanium card number and your Apple Pay card number.

On your iPhone

1. Open the Wallet app and tap Apple Card.
2. Tap the card number icon , then authenticate with Face ID, Touch ID, or your passcode. If you don't see the card number icon, you need to update to the latest version of iOS.
3. Next to Card Number, you can see your virtual card number.

To see the last four digits of your titanium card number or Apple Pay card number, tap Additional Card Numbers.<<

See the following Apple Support article for information on finding your Apple Card number: How to find the card numbers associated with your Apple Card - Apple Support

Also note that the number is not displayed on the physical Apple Card (like it is with other credit cards).