6686090 has 8 divisors (see below), whose sum is σ = 12034980. Its totient is φ = 2674432.

The previous prime is 6686051. The next prime is 6686093. The reversal of 6686090 is 906866.

It can be written as a sum of positive squares in 2 ways, for example, as 5958481 + 727609 = 2441^2 + 853^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 6686090.

It is not an unprimeable number, because it can be changed into a prime (6686093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334295 + ... + 334314.

Almost surely, 2^6686090 is an apocalyptic number.

6686090 is a deficient number, since it is larger than the sum of its proper divisors (5348890).

6686090 is a wasteful number, since it uses less digits than its factorization.

6686090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668616.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 6686090 is about 2585.7474741359. The cubic root of 6686090 is about 188.3898091173.

The spelling of 6686090 in words is "six million, six hundred eighty-six thousand, ninety".