16566560 has 48 divisors (see below), whose sum is σ = 39989376. Its totient is φ = 6482688.

The previous prime is 16566559. The next prime is 16566587. The reversal of 16566560 is 6566561.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 16566560.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6419 + ... + 8621.

It is an arithmetic number, because the mean of its divisors is an integer number (833112).

Almost surely, 2^16566560 is an apocalyptic number.

16566560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16566560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19994688).

16566560 is an abundant number, since it is smaller than the sum of its proper divisors (23422816).

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

16566560 is a wasteful number, since it uses less digits than its factorization.

16566560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2265 (or 2257 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 16566560 is about 4070.2039260951. The cubic root of 16566560 is about 254.9240322212.

Subtracting from 16566560 its reverse (6566561), we obtain a palindrome (9999999).

The spelling of 16566560 in words is "sixteen million, five hundred sixty-six thousand, five hundred sixty".