866788550128888 has 32 divisors (see below), whose sum is σ = 1754369629207200. Its totient is φ = 400256182066048.

The previous prime is 866788550128883. The next prime is 866788550128973. The reversal of 866788550128888 is 888821055887668.

866788550128888 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 866788550128799 and 866788550128808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866788550128883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81220810831 + ... + 81220821502.

It is an arithmetic number, because the mean of its divisors is an integer number (54824050912725).

Almost surely, 2^{866788550128888} is an apocalyptic number.

It is an amenable number.

866788550128888 is an abundant number, since it is smaller than the sum of its proper divisors (887581079078312).

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

866788550128888 is a wasteful number, since it uses less digits than its factorization.

866788550128888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162441632391 (or 162441632387 counting only the distinct ones).

The product of its (nonzero) digits is 26424115200, while the sum is 88.

The spelling of 866788550128888 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, five hundred fifty million, one hundred twenty-eight thousand, eight hundred eighty-eight".