8520665906 has 16 divisors (see below), whose sum is σ = 12991172064. Its totient is φ = 4190465664.

The previous prime is 8520665887. The next prime is 8520665927. The reversal of 8520665906 is 6095660258.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42941 + ... + 137423.

It is an arithmetic number, because the mean of its divisors is an integer number (811948254).

Almost surely, 2^8520665906 is an apocalyptic number.

8520665906 is a deficient number, since it is larger than the sum of its proper divisors (4470506158).

8520665906 is a wasteful number, since it uses less digits than its factorization.

8520665906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95225.

The product of its (nonzero) digits is 777600, while the sum is 47.

The square root of 8520665906 is about 92307.4531443697. The cubic root of 8520665906 is about 2042.4801555151.

The spelling of 8520665906 in words is "eight billion, five hundred twenty million, six hundred sixty-five thousand, nine hundred six".