866422201 has 2 divisors, whose sum is σ = 866422202. Its totient is φ = 866422200.

The previous prime is 866422177. The next prime is 866422231. The reversal of 866422201 is 102224668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 843612025 + 22810176 = 29045^2 + 4776^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866422201 is a prime.

It is not a weakly prime, because it can be changed into another prime (866422231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433211100 + 433211101.

It is an arithmetic number, because the mean of its divisors is an integer number (433211101).

Almost surely, 2^866422201 is an apocalyptic number.

It is an amenable number.

866422201 is a deficient number, since it is larger than the sum of its proper divisors (1).

866422201 is an equidigital number, since it uses as much as digits as its factorization.

866422201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 866422201 is about 29435.0505520205. The cubic root of 866422201 is about 953.3298480510.

Adding to 866422201 its reverse (102224668), we get a palindrome (968646869).

The spelling of 866422201 in words is "eight hundred sixty-six million, four hundred twenty-two thousand, two hundred one".