16521666132 has 48 divisors (see below), whose sum is σ = 39807014912. Its totient is φ = 5327843040.

The previous prime is 16521666047. The next prime is 16521666157. The reversal of 16521666132 is 23166612561.

16521666132 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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1662723 + ... + 1672629.

Almost surely, 2^16521666132 is an apocalyptic number.

16521666132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16521666132 is an abundant number, since it is smaller than the sum of its proper divisors (23285348780).

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

16521666132 is a wasteful number, since it uses less digits than its factorization.

16521666132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14428 (or 14426 counting only the distinct ones).

The product of its digits is 77760, while the sum is 39.

The spelling of 16521666132 in words is "sixteen billion, five hundred twenty-one million, six hundred sixty-six thousand, one hundred thirty-two".