660313013 has 2 divisors, whose sum is σ = 660313014. Its totient is φ = 660313012.

The previous prime is 660313009. The next prime is 660313033. The reversal of 660313013 is 310313066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 401521444 + 258791569 = 20038^2 + 16087^2 .

It is a cyclic number.

It is not a de Polignac number, because 660313013 - 2² = 660313009 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 660313013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660313033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330156506 + 330156507.

It is an arithmetic number, because the mean of its divisors is an integer number (330156507).

Almost surely, 2^660313013 is an apocalyptic number.

It is an amenable number.

660313013 is a deficient number, since it is larger than the sum of its proper divisors (1).

660313013 is an equidigital number, since it uses as much as digits as its factorization.

660313013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 660313013 is about 25696.5564424496. The cubic root of 660313013 is about 870.7963875222.

Adding to 660313013 its reverse (310313066), we get a palindrome (970626079).

The spelling of 660313013 in words is "six hundred sixty million, three hundred thirteen thousand, thirteen".