7668645399 has 12 divisors (see below), whose sum is σ = 11077709136. Its totient is φ = 5112071712.

The previous prime is 7668645373. The next prime is 7668645451. The reversal of 7668645399 is 9935468667.

It is not a de Polignac number, because 7668645399 - 2²¹ = 7666548247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7668645329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 193342 + ... + 229604.

It is an arithmetic number, because the mean of its divisors is an integer number (923142428).

Almost surely, 2^7668645399 is an apocalyptic number.

7668645399 is a deficient number, since it is larger than the sum of its proper divisors (3409063737).

7668645399 is a wasteful number, since it uses less digits than its factorization.

7668645399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59766 (or 59763 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 63.

The square root of 7668645399 is about 87570.8022059864. The cubic root of 7668645399 is about 1971.9968585674.

The spelling of 7668645399 in words is "seven billion, six hundred sixty-eight million, six hundred forty-five thousand, three hundred ninety-nine".