8666217 has 16 divisors (see below), whose sum is σ = 14673280. Its totient is φ = 4952016.

The previous prime is 8666201. The next prime is 8666219. The reversal of 8666217 is 7126668.

It is a happy number.

8666217 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8666217 - 2⁴ = 8666201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8666219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22738 + ... + 23115.

It is an arithmetic number, because the mean of its divisors is an integer number (917080).

Almost surely, 2^8666217 is an apocalyptic number.

It is an amenable number.

8666217 is a deficient number, since it is larger than the sum of its proper divisors (6007063).

8666217 is a wasteful number, since it uses less digits than its factorization.

8666217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45869 (or 45863 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 8666217 is about 2943.8439156993. The cubic root of 8666217 is about 205.4044523584.

The spelling of 8666217 in words is "eight million, six hundred sixty-six thousand, two hundred seventeen".