16566416 has 20 divisors (see below), whose sum is σ = 32317500. Its totient is φ = 8226432.

The previous prime is 16566409. The next prime is 16566427. The reversal of 16566416 is 61466561.

It can be written as a sum of positive squares in 2 ways, for example, as 8179600 + 8386816 = 2860^2 + 2896^2 .

It is a super-2 number, since 2×16566416² = 548892278170112, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 1091 + ... + 5858.

It is an arithmetic number, because the mean of its divisors is an integer number (1615875).

Almost surely, 2^16566416 is an apocalyptic number.

16566416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16566416 is a deficient number, since it is larger than the sum of its proper divisors (15751084).

16566416 is a wasteful number, since it uses less digits than its factorization.

16566416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7106 (or 7100 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 16566416 is about 4070.1862365253. The cubic root of 16566416 is about 254.9232936014.

The spelling of 16566416 in words is "sixteen million, five hundred sixty-six thousand, four hundred sixteen".