7668654649 has 2 divisors, whose sum is σ = 7668654650. Its totient is φ = 7668654648.

The previous prime is 7668654569. The next prime is 7668654677. The reversal of 7668654649 is 9464568667.

7668654649 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7537712400 + 130942249 = 86820^2 + 11443^2 .

It is a cyclic number.

It is not a de Polignac number, because 7668654649 - 2⁹ = 7668654137 is a prime.

It is not a weakly prime, because it can be changed into another prime (7668654689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3834327324 + 3834327325.

It is an arithmetic number, because the mean of its divisors is an integer number (3834327325).

Almost surely, 2^7668654649 is an apocalyptic number.

It is an amenable number.

7668654649 is a deficient number, since it is larger than the sum of its proper divisors (1).

7668654649 is an equidigital number, since it uses as much as digits as its factorization.

7668654649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52254720, while the sum is 61.

The square root of 7668654649 is about 87570.8550203776. The cubic root of 7668654649 is about 1971.9976514481.

The spelling of 7668654649 in words is "seven billion, six hundred sixty-eight million, six hundred fifty-four thousand, six hundred forty-nine".