8540666 has 8 divisors (see below), whose sum is σ = 12882324. Its totient is φ = 4246560.

The previous prime is 8540639. The next prime is 8540683. The reversal of 8540666 is 6660458.

It can be written as a sum of positive squares in 2 ways, for example, as 5900041 + 2640625 = 2429^2 + 1625^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

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, 11435 + ... + 12158.

Almost surely, 2^8540666 is an apocalyptic number.

8540666 is a deficient number, since it is larger than the sum of its proper divisors (4341658).

8540666 is a wasteful number, since it uses less digits than its factorization.

8540666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23776.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 8540666 is about 2922.4417872731. The cubic root of 8540666 is about 204.4076974186.

The spelling of 8540666 in words is "eight million, five hundred forty thousand, six hundred sixty-six".