16566510012 has 48 divisors (see below), whose sum is σ = 43438617600. Its totient is φ = 4875761088.

The previous prime is 16566509987. The next prime is 16566510029. The reversal of 16566510012 is 21001566561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2305012 + ... + 2312187.

It is an arithmetic number, because the mean of its divisors is an integer number (904971200).

Almost surely, 2^16566510012 is an apocalyptic number.

16566510012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16566510012 is an abundant number, since it is smaller than the sum of its proper divisors (26872107588).

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

16566510012 is a wasteful number, since it uses less digits than its factorization.

16566510012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4617242 (or 4617240 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 16566510012 in words is "sixteen billion, five hundred sixty-six million, five hundred ten thousand, twelve".