866286445890 has 64 divisors (see below), whose sum is σ = 2150918582400. Its totient is φ = 223029510144.

The previous prime is 866286445883. The next prime is 866286445933. The reversal of 866286445890 is 98544682668.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23000514 + ... + 23038146.

It is an arithmetic number, because the mean of its divisors is an integer number (33608102850).

Almost surely, 2^866286445890 is an apocalyptic number.

866286445890 is an abundant number, since it is smaller than the sum of its proper divisors (1284632136510).

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

866286445890 is a wasteful number, since it uses less digits than its factorization.

866286445890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64131.

The product of its (nonzero) digits is 159252480, while the sum is 66.

The spelling of 866286445890 in words is "eight hundred sixty-six billion, two hundred eighty-six million, four hundred forty-five thousand, eight hundred ninety".