7668418664 has 24 divisors (see below), whose sum is σ = 14857077330. Its totient is φ = 3710521440.

The previous prime is 7668418567. The next prime is 7668418669. The reversal of 7668418664 is 4668148667.

It can be written as a sum of positive squares in only one way, i.e., 7437682564 + 230736100 = 86242^2 + 15190^2 .

It is not an unprimeable number, because it can be changed into a prime (7668418669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 491039 + ... + 506414.

Almost surely, 2^7668418664 is an apocalyptic number.

It is an amenable number.

7668418664 is a deficient number, since it is larger than the sum of its proper divisors (7188658666).

7668418664 is a wasteful number, since it uses less digits than its factorization.

7668418664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997521 (or 997486 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 56.

The square root of 7668418664 is about 87569.5076153795. The cubic root of 7668418664 is about 1971.9774233612.

The spelling of 7668418664 in words is "seven billion, six hundred sixty-eight million, four hundred eighteen thousand, six hundred sixty-four".