8666545 has 4 divisors (see below), whose sum is σ = 10399860. Its totient is φ = 6933232.

The previous prime is 8666543. The next prime is 8666591. The reversal of 8666545 is 5456668.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4809249 + 3857296 = 2193^2 + 1964^2 .

It is a cyclic number.

It is not a de Polignac number, because 8666545 - 2¹ = 8666543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8666498 and 8666507.

It is not an unprimeable number, because it can be changed into a prime (8666543) 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 in 3 ways as a sum of consecutive naturals, for example, 866650 + ... + 866659.

It is an arithmetic number, because the mean of its divisors is an integer number (2599965).

Almost surely, 2^8666545 is an apocalyptic number.

It is an amenable number.

8666545 is a deficient number, since it is larger than the sum of its proper divisors (1733315).

8666545 is a wasteful number, since it uses less digits than its factorization.

8666545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733314.

The product of its digits is 172800, while the sum is 40.

The square root of 8666545 is about 2943.8996246476. The cubic root of 8666545 is about 205.4070437163.

The spelling of 8666545 in words is "eight million, six hundred sixty-six thousand, five hundred forty-five".