8535661 has 2 divisors, whose sum is σ = 8535662. Its totient is φ = 8535660.

The previous prime is 8535613. The next prime is 8535673. The reversal of 8535661 is 1665358.

8535661 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., 8037225 + 498436 = 2835^2 + 706^2 .

It is a cyclic number.

It is not a de Polignac number, because 8535661 - 2⁷ = 8535533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8535061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4267830 + 4267831.

It is an arithmetic number, because the mean of its divisors is an integer number (4267831).

Almost surely, 2^8535661 is an apocalyptic number.

It is an amenable number.

8535661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8535661 is an equidigital number, since it uses as much as digits as its factorization.

8535661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 34.

The square root of 8535661 is about 2921.5853573018. The cubic root of 8535661 is about 204.3677606254.

The spelling of 8535661 in words is "eight million, five hundred thirty-five thousand, six hundred sixty-one".