Hi, First of all, please don't be disheartened with what I am going to inform you but it's only going to be a fact.
One of my college batch mate applied in IIMs this year with a score of 670. Profile - 9 years exp, IT Background, Working as a Manager in Accenture (Mid Management profile, manages a team of 52 resources). Guess what? He didn't even got interview call. People like us, from IT background, need to break 700 barrier to apply in these colleges, not sure about IIML, but very much sure about IIMA/B/C
So my dear friend all I want to tell you is that IIMs will put your application in bin if you apply with 570, sorry to say this but it's a fact. 570 might work for those who are working in higher management role or may be for those who are from a different background like Indian Army/Air force/Navy.
My advice to you is to pull up your socks and fight again to get a GMAT score of 720+. Please note even 650 won't do much for you if you are planning for IIMs. With 650 you can get interview calls from SP Jain and XLRI.
Just to add one more point - I am not a expert here. Commented because there is nothing wrong in sharing my 2 cents