7667992997668 has 12 divisors (see below), whose sum is σ = 13851858318592. Its totient is φ = 3710319192360.

The previous prime is 7667992997663. The next prime is 7667992997711. The reversal of 7667992997668 is 8667992997667.

It is a happy number.

It is a super-2 number, since 2×7667992997668² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7667992997663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30919326480 + ... + 30919326727.

Almost surely, 2^{7667992997668} is an apocalyptic number.

It is an amenable number.

7667992997668 is a deficient number, since it is larger than the sum of its proper divisors (6183865320924).

7667992997668 is a wasteful number, since it uses less digits than its factorization.

7667992997668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61838653242 (or 61838653240 counting only the distinct ones).

The product of its digits is 46664771328, while the sum is 91.

Subtracting 7667992997668 from its reverse (8667992997667), we obtain a palindrome (999999999999).

The spelling of 7667992997668 in words is "seven trillion, six hundred sixty-seven billion, nine hundred ninety-two million, nine hundred ninety-seven thousand, six hundred sixty-eight".