660113 has 4 divisors (see below), whose sum is σ = 667620. Its totient is φ = 652608.

The previous prime is 660103. The next prime is 660119. The reversal of 660113 is 311066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 332929 + 327184 = 577^2 + 572^2 .

It is a cyclic number.

It is not a de Polignac number, because 660113 - 2⁴ = 660097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 660091 and 660100.

It is not an unprimeable number, because it can be changed into a prime (660119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3620 + ... + 3797.

It is an arithmetic number, because the mean of its divisors is an integer number (166905).

2⁶⁶⁰¹¹³ is an apocalyptic number.

It is an amenable number.

660113 is a deficient number, since it is larger than the sum of its proper divisors (7507).

660113 is an equidigital number, since it uses as much as digits as its factorization.

660113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7506.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 660113 is about 812.4733841794. The cubic root of 660113 is about 87.0708455393.

Adding to 660113 its reverse (311066), we get a palindrome (971179).

The spelling of 660113 in words is "six hundred sixty thousand, one hundred thirteen".