6605631626609 has 2 divisors, whose sum is σ = 6605631626610. Its totient is φ = 6605631626608.

The previous prime is 6605631626597. The next prime is 6605631626663. The reversal of 6605631626609 is 9066261365066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5748711136609 + 856920490000 = 2397647^2 + 925700^2 .

It is a cyclic number.

It is not a de Polignac number, because 6605631626609 - 2²⁰ = 6605630578033 is a prime.

It is not a weakly prime, because it can be changed into another prime (6605631626809) 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, 3302815813304 + 3302815813305.

It is an arithmetic number, because the mean of its divisors is an integer number (3302815813305).

Almost surely, 2^{6605631626609} is an apocalyptic number.

It is an amenable number.

6605631626609 is a deficient number, since it is larger than the sum of its proper divisors (1).

6605631626609 is an equidigital number, since it uses as much as digits as its factorization.

6605631626609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12597120, while the sum is 56.

The spelling of 6605631626609 in words is "six trillion, six hundred five billion, six hundred thirty-one million, six hundred twenty-six thousand, six hundred nine".