16566122 has 4 divisors (see below), whose sum is σ = 24849186. Its totient is φ = 8283060.

The previous prime is 16566101. The next prime is 16566131. The reversal of 16566122 is 22166561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13535041 + 3031081 = 3679^2 + 1741^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4141529 + ... + 4141532.

Almost surely, 2^16566122 is an apocalyptic number.

16566122 is a deficient number, since it is larger than the sum of its proper divisors (8283064).

16566122 is an equidigital number, since it uses as much as digits as its factorization.

16566122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8283063.

The product of its digits is 4320, while the sum is 29.

The square root of 16566122 is about 4070.1501200816. The cubic root of 16566122 is about 254.9217855727.

The spelling of 16566122 in words is "sixteen million, five hundred sixty-six thousand, one hundred twenty-two".