6685990 has 8 divisors (see below), whose sum is σ = 12034800. Its totient is φ = 2674392.

The previous prime is 6685969. The next prime is 6686041. The reversal of 6685990 is 995866.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334290 + ... + 334309.

It is an arithmetic number, because the mean of its divisors is an integer number (1504350).

Almost surely, 2^6685990 is an apocalyptic number.

6685990 is a deficient number, since it is larger than the sum of its proper divisors (5348810).

6685990 is a wasteful number, since it uses less digits than its factorization.

6685990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668606.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 6685990 is about 2585.7281372952. The cubic root of 6685990 is about 188.3888698999.

The spelling of 6685990 in words is "six million, six hundred eighty-five thousand, nine hundred ninety".