Both men and women are facing a retirement crisis, but it disproportionately affects women, according to the Pension Rights Center.

The retirement income deficit is $6.6 trillion, which is the gap between what people have currently saved and what they will need to retire comfortably. Women continue to be hit the hardest, even though more women are working than ever before.

Older American women are still twice as likely as elderly men to be living near or below the federal poverty line. They also are less likely to have access to reliable retirement income, according to the Service Employees International Union, which released a video on the topic for Women's History Month.