3666558913 has 2 divisors, whose sum is σ = 3666558914. Its totient is φ = 3666558912.

The previous prime is 3666558911. The next prime is 3666558923. The reversal of 3666558913 is 3198556663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3063954609 + 602604304 = 55353^2 + 24548^2 .

It is a cyclic number.

It is not a de Polignac number, because 3666558913 - 2¹ = 3666558911 is a prime.

Together with 3666558911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3666558911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1833279456 + 1833279457.

It is an arithmetic number, because the mean of its divisors is an integer number (1833279457).

Almost surely, 2^3666558913 is an apocalyptic number.

It is an amenable number.

3666558913 is a deficient number, since it is larger than the sum of its proper divisors (1).

3666558913 is an equidigital number, since it uses as much as digits as its factorization.

3666558913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3499200, while the sum is 52.

The square root of 3666558913 is about 60552.1173287937. The cubic root of 3666558913 is about 1542.0065642624.

The spelling of 3666558913 in words is "three billion, six hundred sixty-six million, five hundred fifty-eight thousand, nine hundred thirteen".