6687370737866 has 24 divisors (see below), whose sum is σ = 12566377982340. Its totient is φ = 2645553258432.

The previous prime is 6687370737863. The next prime is 6687370737889.

6687370737866 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 4919457460225 + 1767913277641 = 2217985^2 + 1329629^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6687370737793 and 6687370737802.

It is not an unprimeable number, because it can be changed into a prime (6687370737863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2624555531 + ... + 2624558078.

Almost surely, 2^{6687370737866} is an apocalyptic number.

6687370737866 is a deficient number, since it is larger than the sum of its proper divisors (5879007244474).

6687370737866 is a wasteful number, since it uses less digits than its factorization.

6687370737866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5249113638 (or 5249113631 counting only the distinct ones).

The product of its (nonzero) digits is 1792336896, while the sum is 74.

The spelling of 6687370737866 in words is "six trillion, six hundred eighty-seven billion, three hundred seventy million, seven hundred thirty-seven thousand, eight hundred sixty-six".