866788526228044 has 36 divisors (see below), whose sum is σ = 1764541645563144. Its totient is φ = 371479142212416.

The previous prime is 866788526228041. The next prime is 866788526228059. The reversal of 866788526228044 is 440822625887668.

It is not an unprimeable number, because it can be changed into a prime (866788526228041) 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 11 ways as a sum of consecutive naturals, for example, 34778047 + ... + 54250249.

Almost surely, 2^{866788526228044} is an apocalyptic number.

It is an amenable number.

866788526228044 is an abundant number, since it is smaller than the sum of its proper divisors (897753119335100).

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

866788526228044 is a wasteful number, since it uses less digits than its factorization.

866788526228044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19699334 (or 19699325 counting only the distinct ones).

The product of its (nonzero) digits is 3963617280, while the sum is 76.

The spelling of 866788526228044 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, five hundred twenty-six million, two hundred twenty-eight thousand, forty-four".