16560749 has 2 divisors, whose sum is σ = 16560750. Its totient is φ = 16560748.

The previous prime is 16560743. The next prime is 16560763. The reversal of 16560749 is 94706561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12180100 + 4380649 = 3490^2 + 2093^2 .

It is a cyclic number.

It is not a de Polignac number, because 16560749 - 2⁸ = 16560493 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16560743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8280374 + 8280375.

It is an arithmetic number, because the mean of its divisors is an integer number (8280375).

Almost surely, 2^16560749 is an apocalyptic number.

It is an amenable number.

16560749 is a deficient number, since it is larger than the sum of its proper divisors (1).

16560749 is an equidigital number, since it uses as much as digits as its factorization.

16560749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 16560749 is about 4069.4900171889. The cubic root of 16560749 is about 254.8942224359.

The spelling of 16560749 in words is "sixteen million, five hundred sixty thousand, seven hundred forty-nine".