8566840825 has 12 divisors (see below), whose sum is σ = 10627883388. Its totient is φ = 6850246400.

The previous prime is 8566840819. The next prime is 8566840879. The reversal of 8566840825 is 5280486658.

It can be written as a sum of positive squares in 6 ways, for example, as 179211769 + 8387629056 = 13387^2 + 91584^2 .

It is a de Polignac number, because none of the positive numbers 2^k-8566840825 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25756 + ... + 133405.

It is an arithmetic number, because the mean of its divisors is an integer number (885656949).

Almost surely, 2^8566840825 is an apocalyptic number.

It is an amenable number.

8566840825 is a deficient number, since it is larger than the sum of its proper divisors (2061042563).

8566840825 is a wasteful number, since it uses less digits than its factorization.

8566840825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161324 (or 161319 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 52.

The square root of 8566840825 is about 92557.2299985258. The cubic root of 8566840825 is about 2046.1630250941.

The spelling of 8566840825 in words is "eight billion, five hundred sixty-six million, eight hundred forty thousand, eight hundred twenty-five".