It is a happy number.
It is a congruent number.
Almost surely, 22660023220 is an apocalyptic number.
2660023220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2660023220 is a wasteful number, since it uses less digits than its factorization.
2660023220 is an evil number, because the sum of its binary digits is even.
The square root of 2660023220 is about 51575.4129406639. The cubic root of 2660023220 is about 1385.5700139086.
Adding to 2660023220 its reverse (223200662), we get a palindrome (2883223882).
The spelling of 2660023220 in words is "two billion, six hundred sixty million, twenty-three thousand, two hundred twenty".