6688791 has 16 divisors (see below), whose sum is σ = 10341120. Its totient is φ = 4264920.

The previous prime is 6688789. The next prime is 6688793. The reversal of 6688791 is 1978866.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6688789) and next prime (6688793).

It is not a de Polignac number, because 6688791 - 2¹ = 6688789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6688793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4765 + ... + 6006.

It is an arithmetic number, because the mean of its divisors is an integer number (646320).

Almost surely, 2^6688791 is an apocalyptic number.

6688791 is a deficient number, since it is larger than the sum of its proper divisors (3652329).

6688791 is a wasteful number, since it uses less digits than its factorization.

6688791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10803 (or 10797 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 6688791 is about 2586.2697075131. The cubic root of 6688791 is about 188.4151738357.

The spelling of 6688791 in words is "six million, six hundred eighty-eight thousand, seven hundred ninety-one".