411600661 has 2 divisors, whose sum is σ = 411600662. Its totient is φ = 411600660.

The previous prime is 411600647. The next prime is 411600727. The reversal of 411600661 is 166006114.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255200625 + 156400036 = 15975^2 + 12506^2 .

It is a cyclic number.

It is not a de Polignac number, because 411600661 - 2¹⁷ = 411469589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (411600641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205800330 + 205800331.

It is an arithmetic number, because the mean of its divisors is an integer number (205800331).

Almost surely, 2^411600661 is an apocalyptic number.

It is an amenable number.

411600661 is a deficient number, since it is larger than the sum of its proper divisors (1).

411600661 is an equidigital number, since it uses as much as digits as its factorization.

411600661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 411600661 is about 20287.9437351349. The cubic root of 411600661 is about 743.8613966234.

Adding to 411600661 its reverse (166006114), we get a palindrome (577606775).

The spelling of 411600661 in words is "four hundred eleven million, six hundred thousand, six hundred sixty-one".