866202017 has 2 divisors, whose sum is σ = 866202018. Its totient is φ = 866202016.

The previous prime is 866201971. The next prime is 866202041. The reversal of 866202017 is 710202668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 843553936 + 22648081 = 29044^2 + 4759^2 .

It is a cyclic number.

It is not a de Polignac number, because 866202017 - 2⁶ = 866201953 is a prime.

It is not a weakly prime, because it can be changed into another prime (866202097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433101008 + 433101009.

It is an arithmetic number, because the mean of its divisors is an integer number (433101009).

Almost surely, 2^866202017 is an apocalyptic number.

It is an amenable number.

866202017 is a deficient number, since it is larger than the sum of its proper divisors (1).

866202017 is an equidigital number, since it uses as much as digits as its factorization.

866202017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 866202017 is about 29431.3101475283. The cubic root of 866202017 is about 953.2490845915.

The spelling of 866202017 in words is "eight hundred sixty-six million, two hundred two thousand, seventeen".