660795013 has 2 divisors, whose sum is σ = 660795014. Its totient is φ = 660795012.

The previous prime is 660795001. The next prime is 660795017. The reversal of 660795013 is 310597066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 619860609 + 40934404 = 24897^2 + 6398^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660795013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660795017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330397506 + 330397507.

It is an arithmetic number, because the mean of its divisors is an integer number (330397507).

Almost surely, 2^660795013 is an apocalyptic number.

It is an amenable number.

660795013 is a deficient number, since it is larger than the sum of its proper divisors (1).

660795013 is an equidigital number, since it uses as much as digits as its factorization.

660795013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 660795013 is about 25705.9334201270. The cubic root of 660795013 is about 871.0082172479.

The spelling of 660795013 in words is "six hundred sixty million, seven hundred ninety-five thousand, thirteen".