6685985 has 16 divisors (see below), whose sum is σ = 8557056. Its totient is φ = 5003328.

The previous prime is 6685969. The next prime is 6686041. The reversal of 6685985 is 5895866.

It is a happy number.

It is not a de Polignac number, because 6685985 - 2⁴ = 6685969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4787 + ... + 6023.

It is an arithmetic number, because the mean of its divisors is an integer number (534816).

Almost surely, 2^6685985 is an apocalyptic number.

It is an amenable number.

6685985 is a deficient number, since it is larger than the sum of its proper divisors (1871071).

6685985 is a wasteful number, since it uses less digits than its factorization.

6685985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312.

The product of its digits is 518400, while the sum is 47.

The square root of 6685985 is about 2585.7271704493. The cubic root of 6685985 is about 188.3888229388.

The spelling of 6685985 in words is "six million, six hundred eighty-five thousand, nine hundred eighty-five".