8666945 has 16 divisors (see below), whose sum is σ = 12512640. Its totient is φ = 5629824.

The previous prime is 8666939. The next prime is 8666953. The reversal of 8666945 is 5496668.

It is a cyclic number.

It is not a de Polignac number, because 8666945 - 2⁶ = 8666881 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8666896 and 8666905.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5852 + ... + 7181.

It is an arithmetic number, because the mean of its divisors is an integer number (782040).

Almost surely, 2^8666945 is an apocalyptic number.

It is an amenable number.

8666945 is a deficient number, since it is larger than the sum of its proper divisors (3845695).

8666945 is a wasteful number, since it uses less digits than its factorization.

8666945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13064.

The product of its digits is 311040, while the sum is 44.

The square root of 8666945 is about 2943.9675609626. The cubic root of 8666945 is about 205.4102038205.

The spelling of 8666945 in words is "eight million, six hundred sixty-six thousand, nine hundred forty-five".