6689635 has 8 divisors (see below), whose sum is σ = 8058816. Its totient is φ = 5330880.

The previous prime is 6689629. The next prime is 6689659. The reversal of 6689635 is 5369866.

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

It is not a de Polignac number, because 6689635 - 2¹³ = 6681443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6689591 and 6689600.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1114 + ... + 3823.

It is an arithmetic number, because the mean of its divisors is an integer number (1007352).

Almost surely, 2^6689635 is an apocalyptic number.

6689635 is a deficient number, since it is larger than the sum of its proper divisors (1369181).

6689635 is a wasteful number, since it uses less digits than its factorization.

6689635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5213.

The product of its digits is 233280, while the sum is 43.

The square root of 6689635 is about 2586.4328717367. The cubic root of 6689635 is about 188.4230983230.

The spelling of 6689635 in words is "six million, six hundred eighty-nine thousand, six hundred thirty-five".