866847080216568 has 64 divisors (see below), whose sum is σ = 2364306606299520. Its totient is φ = 262661132764800.

The previous prime is 866847080216567. The next prime is 866847080216573. The reversal of 866847080216568 is 865612080748668.

It is a self number, because there is not a number n which added to its sum of digits gives 866847080216568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866847080216567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120244843 + ... + 127249818.

It is an arithmetic number, because the mean of its divisors is an integer number (36942290723430).

Almost surely, 2^{866847080216568} is an apocalyptic number.

866847080216568 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

866847080216568 is an abundant number, since it is smaller than the sum of its proper divisors (1497459526082952).

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

866847080216568 is a wasteful number, since it uses less digits than its factorization.

866847080216568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247507948 (or 247507944 counting only the distinct ones).

The product of its (nonzero) digits is 1486356480, while the sum is 75.

The spelling of 866847080216568 in words is "eight hundred sixty-six trillion, eight hundred forty-seven billion, eighty million, two hundred sixteen thousand, five hundred sixty-eight".