941665661 has 2 divisors, whose sum is σ = 941665662. Its totient is φ = 941665660.

The previous prime is 941665639. The next prime is 941665679. The reversal of 941665661 is 166566149.

941665661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 722803225 + 218862436 = 26885^2 + 14794^2 .

It is a cyclic number.

It is not a de Polignac number, because 941665661 - 2¹⁰ = 941664637 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 (941665691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 470832830 + 470832831.

It is an arithmetic number, because the mean of its divisors is an integer number (470832831).

Almost surely, 2^941665661 is an apocalyptic number.

It is an amenable number.

941665661 is a deficient number, since it is larger than the sum of its proper divisors (1).

941665661 is an equidigital number, since it uses as much as digits as its factorization.

941665661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 44.

The square root of 941665661 is about 30686.5713464375. The cubic root of 941665661 is about 980.1643695559.

The spelling of 941665661 in words is "nine hundred forty-one million, six hundred sixty-five thousand, six hundred sixty-one".