6691555792 has 10 divisors (see below), whose sum is σ = 12964889378. Its totient is φ = 3345777888.

The previous prime is 6691555751. The next prime is 6691555817. The reversal of 6691555792 is 2975551966.

It can be written as a sum of positive squares in only one way, i.e., 6667702336 + 23853456 = 81656^2 + 4884^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209111103 + ... + 209111134.

Almost surely, 2^6691555792 is an apocalyptic number.

It is an amenable number.

6691555792 is a deficient number, since it is larger than the sum of its proper divisors (6273333586).

6691555792 is a wasteful number, since it uses less digits than its factorization.

6691555792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418222245 (or 418222239 counting only the distinct ones).

The product of its digits is 5103000, while the sum is 55.

The square root of 6691555792 is about 81801.9302461745. The cubic root of 6691555792 is about 1884.4113054479.

The spelling of 6691555792 in words is "six billion, six hundred ninety-one million, five hundred fifty-five thousand, seven hundred ninety-two".