866223738705882 has 8 divisors (see below), whose sum is σ = 1732447477411776. Its totient is φ = 288741246235292.

The previous prime is 866223738705863. The next prime is 866223738705979. The reversal of 866223738705882 is 288507837322668.

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

866223738705882 is an admirable number.

It is a super-2 number, since 2×866223738705882² (a number of 31 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72185311558818 + ... + 72185311558829.

It is an arithmetic number, because the mean of its divisors is an integer number (216555934676472).

Almost surely, 2^{866223738705882} is an apocalyptic number.

866223738705882 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

866223738705882 is a wasteful number, since it uses less digits than its factorization.

866223738705882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144370623117652.

The product of its (nonzero) digits is 2601123840, while the sum is 75.

The spelling of 866223738705882 in words is "eight hundred sixty-six trillion, two hundred twenty-three billion, seven hundred thirty-eight million, seven hundred five thousand, eight hundred eighty-two".