6659113757449 has 2 divisors, whose sum is σ = 6659113757450. Its totient is φ = 6659113757448.

The previous prime is 6659113757447. The next prime is 6659113757521. The reversal of 6659113757449 is 9447573119566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5513503167225 + 1145610590224 = 2348085^2 + 1070332^2 .

It is a cyclic number.

It is not a de Polignac number, because 6659113757449 - 2¹ = 6659113757447 is a prime.

Together with 6659113757447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6659113757447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3329556878724 + 3329556878725.

It is an arithmetic number, because the mean of its divisors is an integer number (3329556878725).

Almost surely, 2^{6659113757449} is an apocalyptic number.

It is an amenable number.

6659113757449 is a deficient number, since it is larger than the sum of its proper divisors (1).

6659113757449 is an equidigital number, since it uses as much as digits as its factorization.

6659113757449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 171460800, while the sum is 67.

The spelling of 6659113757449 in words is "six trillion, six hundred fifty-nine billion, one hundred thirteen million, seven hundred fifty-seven thousand, four hundred forty-nine".