6066640660649 has 2 divisors, whose sum is σ = 6066640660650. Its totient is φ = 6066640660648.

The previous prime is 6066640660601. The next prime is 6066640660651. The reversal of 6066640660649 is 9460660466606.

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., 5348396275600 + 718244385049 = 2312660^2 + 847493^2 .

It is a cyclic number.

It is not a de Polignac number, because 6066640660649 - 2³² = 6062345693353 is a prime.

Together with 6066640660651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6066640660669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3033320330324 + 3033320330325.

It is an arithmetic number, because the mean of its divisors is an integer number (3033320330325).

Almost surely, 2^{6066640660649} is an apocalyptic number.

It is an amenable number.

6066640660649 is a deficient number, since it is larger than the sum of its proper divisors (1).

6066640660649 is an equidigital number, since it uses as much as digits as its factorization.

6066640660649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40310784, while the sum is 59.

The spelling of 6066640660649 in words is "six trillion, sixty-six billion, six hundred forty million, six hundred sixty thousand, six hundred forty-nine".