6667388685 has 12 divisors (see below), whose sum is σ = 11556807132. Its totient is φ = 3555940608.

The previous prime is 6667388683. The next prime is 6667388713. The reversal of 6667388685 is 5868837666.

It can be written as a sum of positive squares in 2 ways, for example, as 1763748009 + 4903640676 = 41997^2 + 70026^2 .

It is not a de Polignac number, because 6667388685 - 2¹ = 6667388683 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6667388683) 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, 74082052 + ... + 74082141.

It is an arithmetic number, because the mean of its divisors is an integer number (963067261).

Almost surely, 2^6667388685 is an apocalyptic number.

It is an amenable number.

6667388685 is a deficient number, since it is larger than the sum of its proper divisors (4889418447).

6667388685 is a wasteful number, since it uses less digits than its factorization.

6667388685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148164204 (or 148164201 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 63.

The square root of 6667388685 is about 81654.0794143195. The cubic root of 6667388685 is about 1882.1399998359.

The spelling of 6667388685 in words is "six billion, six hundred sixty-seven million, three hundred eighty-eight thousand, six hundred eighty-five".