6690789 has 16 divisors (see below), whose sum is σ = 11328640. Its totient is φ = 3823200.

The previous prime is 6690787. The next prime is 6690797. The reversal of 6690789 is 9870966.

It is not a de Polignac number, because 6690789 - 2¹ = 6690787 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6690787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17512 + ... + 17889.

It is an arithmetic number, because the mean of its divisors is an integer number (708040).

Almost surely, 2^6690789 is an apocalyptic number.

It is an amenable number.

6690789 is a deficient number, since it is larger than the sum of its proper divisors (4637851).

6690789 is a wasteful number, since it uses less digits than its factorization.

6690789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35417 (or 35411 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 6690789 is about 2586.6559492905. The cubic root of 6690789 is about 188.4339323846.

The spelling of 6690789 in words is "six million, six hundred ninety thousand, seven hundred eighty-nine".