866011 has 2 divisors, whose sum is σ = 866012. Its totient is φ = 866010.

The previous prime is 866009. The next prime is 866029. The reversal of 866011 is 110668.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 866011 - 2¹ = 866009 is a prime.

Together with 866009, it forms a pair of twin primes.

866011 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (866051) 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, 433005 + 433006.

It is an arithmetic number, because the mean of its divisors is an integer number (433006).

2⁸⁶⁶⁰¹¹ is an apocalyptic number.

866011 is a deficient number, since it is larger than the sum of its proper divisors (1).

866011 is an equidigital number, since it uses as much as digits as its factorization.

866011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 866011 is about 930.5971201331. The cubic root of 866011 is about 95.3179008496.

Adding to 866011 its reverse (110668), we get a palindrome (976679).

The spelling of 866011 in words is "eight hundred sixty-six thousand, eleven".