6686925939 has 6 divisors (see below), whose sum is σ = 9658893036. Its totient is φ = 4457950620.

The previous prime is 6686925913. The next prime is 6686925961. The reversal of 6686925939 is 9395296866.

It is not a de Polignac number, because 6686925939 - 2¹¹ = 6686923891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6686921939) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 371495877 + ... + 371495894.

It is an arithmetic number, because the mean of its divisors is an integer number (1609815506).

Almost surely, 2^6686925939 is an apocalyptic number.

6686925939 is a deficient number, since it is larger than the sum of its proper divisors (2971967097).

6686925939 is a wasteful number, since it uses less digits than its factorization.

6686925939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742991777 (or 742991774 counting only the distinct ones).

The product of its digits is 37791360, while the sum is 63.

The square root of 6686925939 is about 81773.6261822845. The cubic root of 6686925939 is about 1883.9766003490.

The spelling of 6686925939 in words is "six billion, six hundred eighty-six million, nine hundred twenty-five thousand, nine hundred thirty-nine".