6604504649 has 2 divisors, whose sum is σ = 6604504650. Its totient is φ = 6604504648.

The previous prime is 6604504637. The next prime is 6604504651. The reversal of 6604504649 is 9464054066.

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., 6298009600 + 306495049 = 79360^2 + 17507^2 .

It is a cyclic number.

It is not a de Polignac number, because 6604504649 - 2²⁰ = 6603456073 is a prime.

It is a super-2 number, since 2×6604504649² = 87238963317325226402, which contains 22 as substring.

Together with 6604504651, 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 (6604504609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3302252324 + 3302252325.

It is an arithmetic number, because the mean of its divisors is an integer number (3302252325).

Almost surely, 2^6604504649 is an apocalyptic number.

It is an amenable number.

6604504649 is a deficient number, since it is larger than the sum of its proper divisors (1).

6604504649 is an equidigital number, since it uses as much as digits as its factorization.

6604504649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 44.

The square root of 6604504649 is about 81268.1035154629. The cubic root of 6604504649 is about 1876.2041118009.

The spelling of 6604504649 in words is "six billion, six hundred four million, five hundred four thousand, six hundred forty-nine".