The link I posted earlier,
"Another requirement is that the spouse must be at least age 62 or have
a qualifying child in her/his care."
A bit further down the page where you are asked to enter the the
effective month and year for which you would like to begin receiving
benefits it also says:
"You must be at least age 62 to begin receiving benefits."
That seems to clearly state that the age limit for the spouse is 62 and
if 62 is incorrect they are certainly consistent with the error.
the followingappears at the top of the page.
"Even if he or she has never worked under Social Security, your spouse
* can begin collecting the benefits as early as age 62. However, if
the benefit begins early, the amount will be permanently reduced by a
percentage based on the number of months up to his or her full
I would request a specific citation in the social security regulations
to support the 66 that they quoted.