866455142256 has 120 divisors (see below), whose sum is σ = 2784540944640. Its totient is φ = 248743094400.

The previous prime is 866455142233. The next prime is 866455142281. The reversal of 866455142256 is 652241554668.

866455142256 is a `hidden beast` number, since 8 + 6 + 64 + 551 + 4 + 2 + 25 + 6 = 666.

866455142256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14364760 + ... + 14424951.

It is an arithmetic number, because the mean of its divisors is an integer number (23204507872).

Almost surely, 2^866455142256 is an apocalyptic number.

It is an amenable number.

866455142256 is an abundant number, since it is smaller than the sum of its proper divisors (1918085802384).

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

866455142256 is a wasteful number, since it uses less digits than its factorization.

866455142256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28789755 (or 28789746 counting only the distinct ones).

The product of its digits is 13824000, while the sum is 54.

The spelling of 866455142256 in words is "eight hundred sixty-six billion, four hundred fifty-five million, one hundred forty-two thousand, two hundred fifty-six".