866788810301641 has 2 divisors, whose sum is σ = 866788810301642. Its totient is φ = 866788810301640.

The previous prime is 866788810301621. The next prime is 866788810301731. The reversal of 866788810301641 is 146103018887668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 850295627309241 + 16493182992400 = 29159829^2 + 4061180^2 .

It is a cyclic number.

It is not a de Polignac number, because 866788810301641 - 2³⁹ = 866239054487753 is a prime.

It is not a weakly prime, because it can be changed into another prime (866788810301621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433394405150820 + 433394405150821.

It is an arithmetic number, because the mean of its divisors is an integer number (433394405150821).

Almost surely, 2^{866788810301641} is an apocalyptic number.

It is an amenable number.

866788810301641 is a deficient number, since it is larger than the sum of its proper divisors (1).

866788810301641 is an equidigital number, since it uses as much as digits as its factorization.

866788810301641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 74317824, while the sum is 67.

The spelling of 866788810301641 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, eight hundred ten million, three hundred one thousand, six hundred forty-one".