Monica,
With all due respect, Rick's reply does not acknowledge the situation of your father being a widower which has different SS rules. I'm no expert but I'll speak in regard to my own options as verified by meeting with SS representative at the local office. I'm close to the same age as your Dad and am a widow. I could have started SS at 60 and drawn on my husbands record which would have paid at a lower rate then forever. SS rep suggested I do this after running the numbers. I didn't need the money and wanted a bigger distribution later so I met with my CPA as well to look at the numbers. At the time I retired, the larger payout figure was always my husband's record. I decided to wait until age 62 and draw a reduced rate on myself. At 66 I can draw full rate based on my husband. When I went to the SS ofice to finalize applying at 62 on my record, I asked the rep if it would be beneficial to wait until 70 to draw full rate on my husband. He ran some numbers but said I should just draw on him at 66. Before I'm 66 I'll get SS's figures and I'll provide the numbers and pass it by my CPA again. Age 70 might or might not be worth it.
None of us know how long we will live but I'm considering my own good health and the longivity in my family.
Your father should meet with SS and be sure of his options. Weigh all the numbers they provide and then make a decision. Which spouse has the highest payout rate and by how much could influence which option is the best.
For other posters, I'll add that widows who accept the age 60 reduced rate draw have no other options down the road based on my understanding.
Good luck with your decisions.
Sandy