16566506560 has 56 divisors (see below), whose sum is σ = 39480719616. Its totient is φ = 6621273600.

The previous prime is 16566506549. The next prime is 16566506587. The reversal of 16566506560 is 6560566561.

It is a self number, because there is not a number n which added to its sum of digits gives 16566506560.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390385 + ... + 430735.

Almost surely, 2^16566506560 is an apocalyptic number.

16566506560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16566506560 is an abundant number, since it is smaller than the sum of its proper divisors (22914213056).

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

16566506560 is a wasteful number, since it uses less digits than its factorization.

16566506560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41651 (or 41641 counting only the distinct ones).

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

The spelling of 16566506560 in words is "sixteen billion, five hundred sixty-six million, five hundred six thousand, five hundred sixty".