Bloomberg have compiled the figures, and say Greece needs to refinance or repay about 6.5bn EUR in debt & interest in the next 3 weeks
In addition:
its budget forecasts a 2.1 billion cash deficit in March
A shortfall in tax revenue already opened a cash hole of 217 million euros in January, derailing budget targets
Says the deadlock with Europe threatens to "pull the country back into a recession this quarter, or even a possible default within weeks"