9660691 has 2 divisors, whose sum is σ = 9660692. Its totient is φ = 9660690.

The previous prime is 9660689. The next prime is 9660701. The reversal of 9660691 is 1960669.

9660691 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (1960669) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9660691 - 2¹ = 9660689 is a prime.

Together with 9660689, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 9660691.

It is not a weakly prime, because it can be changed into another prime (9660611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4830345 + 4830346.

It is an arithmetic number, because the mean of its divisors is an integer number (4830346).

Almost surely, 2^9660691 is an apocalyptic number.

9660691 is the 1795-th hex number.

9660691 is a deficient number, since it is larger than the sum of its proper divisors (1).

9660691 is an equidigital number, since it uses as much as digits as its factorization.

9660691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 9660691 is about 3108.1652143990. The cubic root of 9660691 is about 212.9786470105.

The spelling of 9660691 in words is "nine million, six hundred sixty thousand, six hundred ninety-one".