660224020 has 24 divisors (see below), whose sum is σ = 1387911168. Its totient is φ = 263815200.

The previous prime is 660224011. The next prime is 660224023. The reversal of 660224020 is 20422066.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 660223982 and 660224000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660224023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3165 + ... + 36475.

It is an arithmetic number, because the mean of its divisors is an integer number (57829632).

Almost surely, 2^660224020 is an apocalyptic number.

It is an amenable number.

660224020 is an abundant number, since it is smaller than the sum of its proper divisors (727687148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660224020 is a wasteful number, since it uses less digits than its factorization.

660224020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34311 (or 34309 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 660224020 is about 25694.8247707588. The cubic root of 660224020 is about 870.7572655385.

Adding to 660224020 its reverse (20422066), we get a palindrome (680646086).

The spelling of 660224020 in words is "six hundred sixty million, two hundred twenty-four thousand, twenty".