Here’s a rather complicated explanation of the rules that apply. No, you don’t get benefits based on those he “would have” gotten at this age– BUT, there is a special deal for widows of spouses who claimed early benefits. Here’s the rule:
If the deceased worker started receiving reduced retirement benefits before their full retirement age, a special rule called the retirement insurance benefit limit may apply to the surviving spouse. The retirement insurance benefit limit is the maximum survivor benefit you may receive. Generally, the limit is the higher of:
The reduced monthly retirement benefit to which the deceased spouse would have been entitled if they had lived, or
82.5 percent of the unreduced deceased spouse’s monthly benefit if they had started receiving benefits at their full retirement age (rather than choosing to receive a reduced retirement benefit early).
I suggest you contact Social Security and ask them to re-calculate YOUR benefit amount based on the rule above!