866540208 has 40 divisors (see below), whose sum is σ = 2246678128. Its totient is φ = 287799552.

The previous prime is 866540189. The next prime is 866540209. The reversal of 866540208 is 802045668.

866540208 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (866540209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19291 + ... + 45882.

Almost surely, 2^866540208 is an apocalyptic number.

It is an amenable number.

866540208 is an abundant number, since it is smaller than the sum of its proper divisors (1380137920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866540208 is a wasteful number, since it uses less digits than its factorization.

866540208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65461 (or 65455 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 866540208 is about 29437.0550157450. The cubic root of 866540208 is about 953.3731273699.

The spelling of 866540208 in words is "eight hundred sixty-six million, five hundred forty thousand, two hundred eight".