410665561 has 2 divisors, whose sum is σ = 410665562. Its totient is φ = 410665560.

The previous prime is 410665531. The next prime is 410665573. The reversal of 410665561 is 165566014.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 395015625 + 15649936 = 19875^2 + 3956^2 .

It is a cyclic number.

It is not a de Polignac number, because 410665561 - 2⁹ = 410665049 is a prime.

It is not a weakly prime, because it can be changed into another prime (410665511) 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, 205332780 + 205332781.

It is an arithmetic number, because the mean of its divisors is an integer number (205332781).

Almost surely, 2^410665561 is an apocalyptic number.

It is an amenable number.

410665561 is a deficient number, since it is larger than the sum of its proper divisors (1).

410665561 is an equidigital number, since it uses as much as digits as its factorization.

410665561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 410665561 is about 20264.8849244204. The cubic root of 410665561 is about 743.2976526182.

The spelling of 410665561 in words is "four hundred ten million, six hundred sixty-five thousand, five hundred sixty-one".