A six-digit number, the highest digit is 6, the lowest digit is 2, the tens digit is twice the ones digit, the sum of the thousands digit and the tens digit is 11, the sum of the last three digits is 12, and the sum of the first three digits The sum is 1 more than the sum of the last three digits. What is this number?
一个六位数，最高位是6，最低位是2，十位数字是个位数字的2倍，千位数字与十位数字的和是11，后三位之和是12，前三位数字之和比后三位数字之和多1，这个数是多少．
<result>607_642</result>