9705000661 has 2 divisors, whose sum is σ = 9705000662. Its totient is φ = 9705000660.

The previous prime is 9705000629. The next prime is 9705000667. The reversal of 9705000661 is 1660005079.

9705000661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6005320036 + 3699680625 = 77494^2 + 60825^2 .

It is a cyclic number.

It is not a de Polignac number, because 9705000661 - 2⁵ = 9705000629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9705000667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4852500330 + 4852500331.

It is an arithmetic number, because the mean of its divisors is an integer number (4852500331).

Almost surely, 2^9705000661 is an apocalyptic number.

It is an amenable number.

9705000661 is a deficient number, since it is larger than the sum of its proper divisors (1).

9705000661 is an equidigital number, since it uses as much as digits as its factorization.

9705000661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 9705000661 is about 98513.9617566972. The cubic root of 9705000661 is about 2133.0376593451.

The spelling of 9705000661 in words is "nine billion, seven hundred five million, six hundred sixty-one", and thus it is an aban number.