9660689 has 2 divisors, whose sum is σ = 9660690. Its totient is φ = 9660688.

The previous prime is 9660661. The next prime is 9660691. The reversal of 9660689 is 9860669.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8179600 + 1481089 = 2860^2 + 1217^2 .

It is a cyclic number.

It is not a de Polignac number, because 9660689 - 2⁸ = 9660433 is a prime.

Together with 9660691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9660659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4830344 + 4830345.

It is an arithmetic number, because the mean of its divisors is an integer number (4830345).

Almost surely, 2^9660689 is an apocalyptic number.

It is an amenable number.

9660689 is a deficient number, since it is larger than the sum of its proper divisors (1).

9660689 is an equidigital number, since it uses as much as digits as its factorization.

9660689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 9660689 is about 3108.1648926658. The cubic root of 9660689 is about 212.9786323132.

The spelling of 9660689 in words is "nine million, six hundred sixty thousand, six hundred eighty-nine".