6620730713 has 2 divisors, whose sum is σ = 6620730714. Its totient is φ = 6620730712.

The previous prime is 6620730661. The next prime is 6620730719. The reversal of 6620730713 is 3170370266.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5403279049 + 1217451664 = 73507^2 + 34892^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6620730713 is a prime.

It is a super-2 number, since 2×6620730713² = 87668150348122976738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6620730719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3310365356 + 3310365357.

It is an arithmetic number, because the mean of its divisors is an integer number (3310365357).

Almost surely, 2^6620730713 is an apocalyptic number.

It is an amenable number.

6620730713 is a deficient number, since it is larger than the sum of its proper divisors (1).

6620730713 is an equidigital number, since it uses as much as digits as its factorization.

6620730713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 35.

The square root of 6620730713 is about 81367.8727324243. The cubic root of 6620730713 is about 1877.7393523820.

The spelling of 6620730713 in words is "six billion, six hundred twenty million, seven hundred thirty thousand, seven hundred thirteen".