16650749 has 2 divisors, whose sum is σ = 16650750. Its totient is φ = 16650748.

The previous prime is 16650719. The next prime is 16650763. The reversal of 16650749 is 94705661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16564900 + 85849 = 4070^2 + 293^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16650749 is a prime.

It is a super-2 number, since 2×16650749² = 554494884522002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16650719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8325374 + 8325375.

It is an arithmetic number, because the mean of its divisors is an integer number (8325375).

Almost surely, 2^16650749 is an apocalyptic number.

It is an amenable number.

16650749 is a deficient number, since it is larger than the sum of its proper divisors (1).

16650749 is an equidigital number, since it uses as much as digits as its factorization.

16650749 is an evil number, because the sum of its binary digits is even.

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

The square root of 16650749 is about 4080.5329308805. The cubic root of 16650749 is about 255.3551325085.

The spelling of 16650749 in words is "sixteen million, six hundred fifty thousand, seven hundred forty-nine".