I understand one option is to apply for SS at full retirement age (66) and immediately suspend payments. Then your wife can apply for spousal benefits at full retirement (66). Note, both must be done after reaching respective full retirement ages. Your benefits continue to grow until it maxes out at 70, but you could start receiving benefits between 66 and 70. Lower benefit than if you wait till 70 though. Your wife can switch to her benefits, which will similarly continue to grow till 70, at anytime. Her switching depends on her working history, is spousal larger than the benefit.
I hope I have it right. I plan to do this and apply for my benefits between 68 and 70, depending on how savings hold up.
I suggest "Get What's Yours: The Secrets to Maxing Out Your Social Security" by Laurence J. Kotikoff, Philip Moeller & Paul Solman. [Obviously for USA citizens.]
Thanks.