16866853536834 has 80 divisors (see below), whose sum is σ = 43272389675328. Its totient is φ = 4810290776928.

The previous prime is 16866853536833. The next prime is 16866853536847. The reversal of 16866853536834 is 43863535866861.

16866853536834 is a `hidden beast` number, since 1 + 6 + 8 + 6 + 6 + 8 + 5 + 3 + 536 + 83 + 4 = 666.

It is a super-2 number, since 2×16866853536834² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16866853536833) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12975469 + ... + 14216064.

Almost surely, 2^{16866853536834} is an apocalyptic number.

16866853536834 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

16866853536834 is an abundant number, since it is smaller than the sum of its proper divisors (26405536138494).

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

16866853536834 is a wasteful number, since it uses less digits than its factorization.

16866853536834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27192101 (or 27192092 counting only the distinct ones).

The product of its digits is 1791590400, while the sum is 72.

The spelling of 16866853536834 in words is "sixteen trillion, eight hundred sixty-six billion, eight hundred fifty-three million, five hundred thirty-six thousand, eight hundred thirty-four".