866786513766078 has 8 divisors (see below), whose sum is σ = 1733573027532168. Its totient is φ = 288928837922024.

The previous prime is 866786513766077. The next prime is 866786513766137. The reversal of 866786513766078 is 870667315687668.

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

866786513766078 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866786513766071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72232209480501 + ... + 72232209480512.

It is an arithmetic number, because the mean of its divisors is an integer number (216696628441521).

Almost surely, 2^{866786513766078} is an apocalyptic number.

866786513766078 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.

866786513766078 is a wasteful number, since it uses less digits than its factorization.

866786513766078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144464418961018.

The product of its (nonzero) digits is 20483850240, while the sum is 84.

The spelling of 866786513766078 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, five hundred thirteen million, seven hundred sixty-six thousand, seventy-eight".