16566349 has 2 divisors, whose sum is σ = 16566350. Its totient is φ = 16566348.

The previous prime is 16566331. The next prime is 16566367. The reversal of 16566349 is 94366561.

It is a balanced prime because it is at equal distance from previous prime (16566331) and next prime (16566367).

It can be written as a sum of positive squares in only one way, i.e., 12638025 + 3928324 = 3555^2 + 1982^2 .

It is a cyclic number.

It is not a de Polignac number, because 16566349 - 2²¹ = 14469197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16506349) 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 as a sum of consecutive naturals, namely, 8283174 + 8283175.

It is an arithmetic number, because the mean of its divisors is an integer number (8283175).

Almost surely, 2^16566349 is an apocalyptic number.

It is an amenable number.

16566349 is a deficient number, since it is larger than the sum of its proper divisors (1).

16566349 is an equidigital number, since it uses as much as digits as its factorization.

16566349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 40.

The square root of 16566349 is about 4070.1780059354. The cubic root of 16566349 is about 254.9229499366.

The spelling of 16566349 in words is "sixteen million, five hundred sixty-six thousand, three hundred forty-nine".