866552255668 has 12 divisors (see below), whose sum is σ = 1654327033632. Its totient is φ = 393887388920.

The previous prime is 866552255623. The next prime is 866552255669.

866552255668 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866552255669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9847184680 + ... + 9847184767.

It is an arithmetic number, because the mean of its divisors is an integer number (137860586136).

Almost surely, 2^866552255668 is an apocalyptic number.

It is an amenable number.

866552255668 is a deficient number, since it is larger than the sum of its proper divisors (787774777964).

866552255668 is a wasteful number, since it uses less digits than its factorization.

866552255668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19694369462 (or 19694369460 counting only the distinct ones).

The product of its digits is 207360000, while the sum is 64.

The spelling of 866552255668 in words is "eight hundred sixty-six billion, five hundred fifty-two million, two hundred fifty-five thousand, six hundred sixty-eight".