When Oprah travelled to Australia last year she gave the couple A$250,000 (NZ$330,000) for medical expenses.
In Anderson's last blog, posted by his wife after his death, he said it was his time to go and he reflected on his battle with cancer.
"The truth being we're all broken, we're all cracked and what so many people see as a fault or a malfunction really is something to be considered useful.
"I'm not sure how much longer I have left but it appears that the physical and medical signs are all pointing to my end.''
His wife, Rachel, confirmed Anderson died on Monday.
"My darling husband went to meet Jesus this morning. It was peaceful and beautiful ...'' she tweeted on his account.
His funeral will be held in Sydney today.
