16566361 has 12 divisors (see below), whose sum is σ = 19407360. Its totient is φ = 14099400.

The previous prime is 16566349. The next prime is 16566367. The reversal of 16566361 is 16366561.

It is not a de Polignac number, because 16566361 - 2¹¹ = 16564313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16566367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6280 + ... + 8518.

It is an arithmetic number, because the mean of its divisors is an integer number (1617280).

Almost surely, 2^16566361 is an apocalyptic number.

It is an amenable number.

16566361 is a deficient number, since it is larger than the sum of its proper divisors (2840999).

16566361 is a wasteful number, since it uses less digits than its factorization.

16566361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2404 (or 2397 counting only the distinct ones).

The product of its digits is 19440, while the sum is 34.

The square root of 16566361 is about 4070.1794800721. The cubic root of 16566361 is about 254.9230114885.

The spelling of 16566361 in words is "sixteen million, five hundred sixty-six thousand, three hundred sixty-one".