8985661 has 2 divisors, whose sum is σ = 8985662. Its totient is φ = 8985660.

The previous prime is 8985659. The next prime is 8985671. The reversal of 8985661 is 1665898.

8985661 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 can be written as a sum of positive squares in only one way, i.e., 6200100 + 2785561 = 2490^2 + 1669^2 .

It is a cyclic number.

It is not a de Polignac number, because 8985661 - 2¹ = 8985659 is a prime.

Together with 8985659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8985611) 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, 4492830 + 4492831.

It is an arithmetic number, because the mean of its divisors is an integer number (4492831).

Almost surely, 2^8985661 is an apocalyptic number.

It is an amenable number.

8985661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8985661 is an equidigital number, since it uses as much as digits as its factorization.

8985661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 43.

The square root of 8985661 is about 2997.6092140237. The cubic root of 8985661 is about 207.8978557276.

The spelling of 8985661 in words is "eight million, nine hundred eighty-five thousand, six hundred sixty-one".