Hi texanusa,
Happy Holidays! If the phone number can't be used to share an album, try sending the invitation to an email address instead.
iCloud Photo Sharing FAQ - Apple Support
http://support.apple.com/en-us/HT202786
Invitations to your shared album can be sent to a person’s email address or a phone number used for iMessage. Learn more about creating a shared album. iCloud: Create a shared album
iCloud: Create a shared album
http://support.apple.com/kb/PH12068
In the Photos app, tap Shared at the bottom of the screen, tap Sharing at the top of the screen, then tap New Shared Album.
If you don’t have any shared albums yet, tap Shared at the bottom of the screen, then tap Create New Album.
Enter a name for your shared album, then tap Next.
Invite people to subscribe by entering their email addresses or tapping the Add button
to select from your contacts, then tap Create.
To let people view your shared album on the web, tap the album in the Shared Albums list, tap People, then turn on Public Website. To send the shared album’s web address to friends, tap Share Link.
I hope this information helps ....
- Judy