16773661 has 2 divisors, whose sum is σ = 16773662. Its totient is φ = 16773660.

The previous prime is 16773649. The next prime is 16773667. The reversal of 16773661 is 16637761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16687225 + 86436 = 4085^2 + 294^2 .

It is a cyclic number.

It is not a de Polignac number, because 16773661 - 2⁹ = 16773149 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16773661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16773667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8386830 + 8386831.

It is an arithmetic number, because the mean of its divisors is an integer number (8386831).

Almost surely, 2^16773661 is an apocalyptic number.

It is an amenable number.

16773661 is a deficient number, since it is larger than the sum of its proper divisors (1).

16773661 is an equidigital number, since it uses as much as digits as its factorization.

16773661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 37.

The square root of 16773661 is about 4095.5660170482. The cubic root of 16773661 is about 255.9819170577.

The spelling of 16773661 in words is "sixteen million, seven hundred seventy-three thousand, six hundred sixty-one".