-- { echo }
SELECT toString(toDateTime('-922337203.6854775808', 1));
2106-02-07 15:41:33.6
SELECT toString(toDateTime('9922337203.6854775808', 1));
2104-12-30 00:50:11.6
SELECT toDateTime64(CAST('10000000000.1' AS Decimal64(1)), 1);
2106-02-07 20:50:08.1
SELECT toDateTime64(CAST('-10000000000.1' AS Decimal64(1)), 1);
2011-12-23 00:38:08.1