7686666868 has 12 divisors (see below), whose sum is σ = 13452281920. Its totient is φ = 3843157752.

The previous prime is 7686666863. The next prime is 7686666881. The reversal of 7686666868 is 8686666867.

It is a super-3 number, since 3×7686666868³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7686666863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141493 + ... + 188131.

Almost surely, 2^7686666868 is an apocalyptic number.

It is an amenable number.

7686666868 is a deficient number, since it is larger than the sum of its proper divisors (5765615052).

7686666868 is a wasteful number, since it uses less digits than its factorization.

7686666868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87846 (or 87844 counting only the distinct ones).

The product of its digits is 167215104, while the sum is 67.

The square root of 7686666868 is about 87673.6383869176. The cubic root of 7686666868 is about 1973.5403940134.

Subtracting 7686666868 from its reverse (8686666867), we obtain a palindrome (999999999).

The spelling of 7686666868 in words is "seven billion, six hundred eighty-six million, six hundred sixty-six thousand, eight hundred sixty-eight".