How do you refer to someone who in his 60s?

sexagenarian['seksujunehreeum]

Someone whose age is in the sixties

You must be thinking of the people in the Prime Minister’s Cabinet. They are all pretty old, aren’t they? A person who is in his 60s is usually referred to as a ‘sexagenarian’. The first syllable is pronounced like the word ‘sex’, and the following ‘a’ is like the ‘a’ in ‘china’. The ‘g’ is like the ‘j’ in ‘juice’ and ‘joke’, and the ‘e’ like the ‘i’ in ‘sit’, ‘bit’, and ‘pit’. The ‘a’ is like the ‘ai’ in ‘fair’, ‘hair’, and ‘pair’. The word is pronounced ‘sex-a-ji-NAI-ri-en with the stress on the fourth syllable.

*The teenager said she was in love with a sexagenarian.