3966111217 has 2 divisors, whose sum is σ = 3966111218. Its totient is φ = 3966111216.

The previous prime is 3966111199. The next prime is 3966111301. The reversal of 3966111217 is 7121116693.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3690684001 + 275427216 = 60751^2 + 16596^2 .

It is a cyclic number.

It is not a de Polignac number, because 3966111217 - 2⁷ = 3966111089 is a prime.

It is a super-2 number, since 2×3966111217² = 31460076371226442178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3966112217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1983055608 + 1983055609.

It is an arithmetic number, because the mean of its divisors is an integer number (1983055609).

Almost surely, 2^3966111217 is an apocalyptic number.

It is an amenable number.

3966111217 is a deficient number, since it is larger than the sum of its proper divisors (1).

3966111217 is an equidigital number, since it uses as much as digits as its factorization.

3966111217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 37.

The square root of 3966111217 is about 62977.0689775255. The cubic root of 3966111217 is about 1582.9054078224.

The spelling of 3966111217 in words is "three billion, nine hundred sixty-six million, one hundred eleven thousand, two hundred seventeen".