16506660012 has 12 divisors (see below), whose sum is σ = 38515540056. Its totient is φ = 5502220000.

The previous prime is 16506660011. The next prime is 16506660043. The reversal of 16506660012 is 21006660561.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (16506660011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687777489 + ... + 687777512.

It is an arithmetic number, because the mean of its divisors is an integer number (3209628338).

Almost surely, 2^16506660012 is an apocalyptic number.

16506660012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16506660012 is an abundant number, since it is smaller than the sum of its proper divisors (22008880044).

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

16506660012 is a wasteful number, since it uses less digits than its factorization.

16506660012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375555008 (or 1375555006 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The spelling of 16506660012 in words is "sixteen billion, five hundred six million, six hundred sixty thousand, twelve".