9660557 has 2 divisors, whose sum is σ = 9660558. Its totient is φ = 9660556.

The previous prime is 9660533. The next prime is 9660559. The reversal of 9660557 is 7550669.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9554281 + 106276 = 3091^2 + 326^2 .

It is a cyclic number.

It is not a de Polignac number, because 9660557 - 2¹² = 9656461 is a prime.

Together with 9660559, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9660557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9660559) 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, 4830278 + 4830279.

It is an arithmetic number, because the mean of its divisors is an integer number (4830279).

Almost surely, 2^9660557 is an apocalyptic number.

It is an amenable number.

9660557 is a deficient number, since it is larger than the sum of its proper divisors (1).

9660557 is an equidigital number, since it uses as much as digits as its factorization.

9660557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 9660557 is about 3108.1436581986. The cubic root of 9660557 is about 212.9776622890.

The spelling of 9660557 in words is "nine million, six hundred sixty thousand, five hundred fifty-seven".