7766672766678 has 64 divisors (see below), whose sum is σ = 19737008248320. Its totient is φ = 2217685296096.

The previous prime is 7766672766653. The next prime is 7766672766679. The reversal of 7766672766678 is 8766672766677.

It is a junction number, because it is equal to n+sod(n) for n = 7766672766597 and 7766672766606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7766672766679) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5699301 + ... + 6929312.

It is an arithmetic number, because the mean of its divisors is an integer number (308390753880).

Almost surely, 2^{7766672766678} is an apocalyptic number.

7766672766678 is an abundant number, since it is smaller than the sum of its proper divisors (11970335481642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7766672766678 is a wasteful number, since it uses less digits than its factorization.

7766672766678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12630258 (or 12630252 counting only the distinct ones).

The product of its digits is 12546358272, while the sum is 81.

Subtracting 7766672766678 from its reverse (8766672766677), we obtain a palindrome (999999999999).

The spelling of 7766672766678 in words is "seven trillion, seven hundred sixty-six billion, six hundred seventy-two million, seven hundred sixty-six thousand, six hundred seventy-eight".