6691042808 has 16 divisors (see below), whose sum is σ = 12547176000. Its totient is φ = 3345129216.

The previous prime is 6691042789. The next prime is 6691042817. The reversal of 6691042808 is 8082401966.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31208 + ... + 119816.

It is an arithmetic number, because the mean of its divisors is an integer number (784198500).

Almost surely, 2^6691042808 is an apocalyptic number.

It is an amenable number.

6691042808 is a deficient number, since it is larger than the sum of its proper divisors (5856133192).

6691042808 is a wasteful number, since it uses less digits than its factorization.

6691042808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98054 (or 98050 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 6691042808 is about 81798.7946610462. The cubic root of 6691042808 is about 1884.3631503510.

The spelling of 6691042808 in words is "six billion, six hundred ninety-one million, forty-two thousand, eight hundred eight".