660440222 has 16 divisors (see below), whose sum is σ = 1070308512. Its totient is φ = 303834720.

The previous prime is 660440219. The next prime is 660440227. The reversal of 660440222 is 222044066.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 660440191 and 660440200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660440227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32753 + ... + 48924.

It is an arithmetic number, because the mean of its divisors is an integer number (66894282).

Almost surely, 2^660440222 is an apocalyptic number.

660440222 is a deficient number, since it is larger than the sum of its proper divisors (409868290).

660440222 is a wasteful number, since it uses less digits than its factorization.

660440222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82003.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 660440222 is about 25699.0315381728. The cubic root of 660440222 is about 870.8523034402.

Adding to 660440222 its reverse (222044066), we get a palindrome (882484288).

The spelling of 660440222 in words is "six hundred sixty million, four hundred forty thousand, two hundred twenty-two".