866856866714 has 8 divisors (see below), whose sum is σ = 1324818985140. Its totient is φ = 425250538336.

The previous prime is 866856866699. The next prime is 866856866737. The reversal of 866856866714 is 417668658668.

It can be written as a sum of positive squares in 2 ways, for example, as 726812516089 + 140044350625 = 852533^2 + 374225^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×866856866714² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4088947379 + ... + 4088947590.

Almost surely, 2^866856866714 is an apocalyptic number.

866856866714 is a deficient number, since it is larger than the sum of its proper divisors (457962118426).

866856866714 is a wasteful number, since it uses less digits than its factorization.

866856866714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8177895024.

The product of its digits is 557383680, while the sum is 71.

The spelling of 866856866714 in words is "eight hundred sixty-six billion, eight hundred fifty-six million, eight hundred sixty-six thousand, seven hundred fourteen".