411996661 has 2 divisors, whose sum is σ = 411996662. Its totient is φ = 411996660.

The previous prime is 411996653. The next prime is 411996667. The reversal of 411996661 is 166699114.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 268140625 + 143856036 = 16375^2 + 11994^2 .

It is a cyclic number.

It is not a de Polignac number, because 411996661 - 2³ = 411996653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (411996667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205998330 + 205998331.

It is an arithmetic number, because the mean of its divisors is an integer number (205998331).

Almost surely, 2^411996661 is an apocalyptic number.

It is an amenable number.

411996661 is a deficient number, since it is larger than the sum of its proper divisors (1).

411996661 is an equidigital number, since it uses as much as digits as its factorization.

411996661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 43.

The square root of 411996661 is about 20297.7008796563. The cubic root of 411996661 is about 744.0998759095.

The spelling of 411996661 in words is "four hundred eleven million, nine hundred ninety-six thousand, six hundred sixty-one".