3666741691 has 2 divisors, whose sum is σ = 3666741692. Its totient is φ = 3666741690.

The previous prime is 3666741671. The next prime is 3666741697. The reversal of 3666741691 is 1961476663.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3666741691 - 2¹⁹ = 3666217403 is a prime.

It is not a weakly prime, because it can be changed into another prime (3666741697) 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, 1833370845 + 1833370846.

It is an arithmetic number, because the mean of its divisors is an integer number (1833370846).

Almost surely, 2^3666741691 is an apocalyptic number.

3666741691 is a deficient number, since it is larger than the sum of its proper divisors (1).

3666741691 is an equidigital number, since it uses as much as digits as its factorization.

3666741691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 49.

The square root of 3666741691 is about 60553.6265718247. The cubic root of 3666741691 is about 1542.0321868511.

The spelling of 3666741691 in words is "three billion, six hundred sixty-six million, seven hundred forty-one thousand, six hundred ninety-one".