885057661 has 2 divisors, whose sum is σ = 885057662. Its totient is φ = 885057660.

The previous prime is 885057631. The next prime is 885057703. The reversal of 885057661 is 166750588.

885057661 is digitally balanced in base 2, 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., 830016100 + 55041561 = 28810^2 + 7419^2 .

It is a cyclic number.

It is not a de Polignac number, because 885057661 - 2⁹ = 885057149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (885057631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 442528830 + 442528831.

It is an arithmetic number, because the mean of its divisors is an integer number (442528831).

Almost surely, 2^885057661 is an apocalyptic number.

It is an amenable number.

885057661 is a deficient number, since it is larger than the sum of its proper divisors (1).

885057661 is an equidigital number, since it uses as much as digits as its factorization.

885057661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 403200, while the sum is 46.

The square root of 885057661 is about 29749.9186721577. The cubic root of 885057661 is about 960.1163274111.

The spelling of 885057661 in words is "eight hundred eighty-five million, fifty-seven thousand, six hundred sixty-one".