6688354811 has 8 divisors (see below), whose sum is σ = 6905272704. Its totient is φ = 6471509760.

The previous prime is 6688354807. The next prime is 6688354847. The reversal of 6688354811 is 1184538866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6688354811 - 2² = 6688354807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6688354811.

It is not an unprimeable number, because it can be changed into a prime (6688354861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216701 + ... + 245633.

It is an arithmetic number, because the mean of its divisors is an integer number (863159088).

Almost surely, 2^6688354811 is an apocalyptic number.

6688354811 is a deficient number, since it is larger than the sum of its proper divisors (216917893).

6688354811 is a wasteful number, since it uses less digits than its factorization.

6688354811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36421.

The product of its digits is 1105920, while the sum is 50.

The square root of 6688354811 is about 81782.3624689334. The cubic root of 6688354811 is about 1884.1107810732.

The spelling of 6688354811 in words is "six billion, six hundred eighty-eight million, three hundred fifty-four thousand, eight hundred eleven".