16556665132 has 192 divisors, whose sum is σ = 37872271360. Its totient is φ = 6172588800.

The previous prime is 16556665127. The next prime is 16556665219. The reversal of 16556665132 is 23156665561.

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 63 ways as a sum of consecutive naturals, for example, 26238457 + ... + 26239087.

Almost surely, 2^16556665132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16556665132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18936135680).

16556665132 is an abundant number, since it is smaller than the sum of its proper divisors (21315606228).

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

16556665132 is a wasteful number, since it uses less digits than its factorization.

16556665132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772 (or 770 counting only the distinct ones).

The product of its digits is 972000, while the sum is 46.

The spelling of 16556665132 in words is "sixteen billion, five hundred fifty-six million, six hundred sixty-five thousand, one hundred thirty-two".