411666109 has 2 divisors, whose sum is σ = 411666110. Its totient is φ = 411666108.

The previous prime is 411666061. The next prime is 411666127. The reversal of 411666109 is 901666114.

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., 361114009 + 50552100 = 19003^2 + 7110^2 .

It is a cyclic number.

It is not a de Polignac number, because 411666109 - 2⁷ = 411665981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (411669109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205833054 + 205833055.

It is an arithmetic number, because the mean of its divisors is an integer number (205833055).

Almost surely, 2^411666109 is an apocalyptic number.

It is an amenable number.

411666109 is a deficient number, since it is larger than the sum of its proper divisors (1).

411666109 is an equidigital number, since it uses as much as digits as its factorization.

411666109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 411666109 is about 20289.5566486801. The cubic root of 411666109 is about 743.9008212932.

It can be divided in two parts, 4116 and 66109, that added together give a square (70225 = 265²).

The spelling of 411666109 in words is "four hundred eleven million, six hundred sixty-six thousand, one hundred nine".