660220113 has 32 divisors (see below), whose sum is σ = 1093181440. Its totient is φ = 345876480.

The previous prime is 660220081. The next prime is 660220117. The reversal of 660220113 is 311022066.

It is a happy number.

It is not a de Polignac number, because 660220113 - 2⁵ = 660220081 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 660220113.

It is not an unprimeable number, because it can be changed into a prime (660220117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14320 + ... + 39057.

It is an arithmetic number, because the mean of its divisors is an integer number (34161920).

Almost surely, 2^660220113 is an apocalyptic number.

It is an amenable number.

660220113 is a deficient number, since it is larger than the sum of its proper divisors (432961327).

660220113 is a wasteful number, since it uses less digits than its factorization.

660220113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53437.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 660220113 is about 25694.7487436636. The cubic root of 660220113 is about 870.7555479118.

Adding to 660220113 its reverse (311022066), we get a palindrome (971242179).

The spelling of 660220113 in words is "six hundred sixty million, two hundred twenty thousand, one hundred thirteen".