16666851834 has 48 divisors (see below), whose sum is σ = 36391329000. Its totient is φ = 5512647168.

The previous prime is 16666851829. The next prime is 16666851857. The reversal of 16666851834 is 43815866661.

It can be written as a sum of positive squares in 4 ways, for example, as 15389146809 + 1277705025 = 124053^2 + 35745^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3197022 + ... + 3202230.

Almost surely, 2^16666851834 is an apocalyptic number.

16666851834 is an abundant number, since it is smaller than the sum of its proper divisors (19724477166).

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

16666851834 is a wasteful number, since it uses less digits than its factorization.

16666851834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6559 (or 6556 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The spelling of 16666851834 in words is "sixteen billion, six hundred sixty-six million, eight hundred fifty-one thousand, eight hundred thirty-four".