Claiming at 67 vs 62: Break-even at age 78.7 — if you live past this, delaying to 67 pays more total
Claiming at 70 vs 67: Break-even at age 82.5 — if you live past this, delaying to 70 pays more total
Average US life expectancy: ~79 (men), ~83 (women). A 65-year-old has a 50% chance of living past 85.