8666219 has 2 divisors, whose sum is σ = 8666220. Its totient is φ = 8666218.

The previous prime is 8666201. The next prime is 8666237. The reversal of 8666219 is 9126668.

It is a balanced prime because it is at equal distance from previous prime (8666201) and next prime (8666237).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8666219 is a prime.

It is a super-2 number, since 2×8666219² = 150206703511922, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (8666269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4333109 + 4333110.

It is an arithmetic number, because the mean of its divisors is an integer number (4333110).

Almost surely, 2^8666219 is an apocalyptic number.

8666219 is a deficient number, since it is larger than the sum of its proper divisors (1).

8666219 is an equidigital number, since it uses as much as digits as its factorization.

8666219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 8666219 is about 2943.8442553912. The cubic root of 8666219 is about 205.4044681596.

The spelling of 8666219 in words is "eight million, six hundred sixty-six thousand, two hundred nineteen".