7686685 has 4 divisors (see below), whose sum is σ = 9224028. Its totient is φ = 6149344.

The previous prime is 7686649. The next prime is 7686689. The reversal of 7686685 is 5866867.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5262436 + 2424249 = 2294^2 + 1557^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7686685 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 (7686689) 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, 768664 + ... + 768673.

It is an arithmetic number, because the mean of its divisors is an integer number (2306007).

Almost surely, 2^7686685 is an apocalyptic number.

It is an amenable number.

7686685 is a deficient number, since it is larger than the sum of its proper divisors (1537343).

7686685 is a wasteful number, since it uses less digits than its factorization.

7686685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537342.

The product of its digits is 483840, while the sum is 46.

The square root of 7686685 is about 2772.4871505563. The cubic root of 7686685 is about 197.3541945800.

The spelling of 7686685 in words is "seven million, six hundred eighty-six thousand, six hundred eighty-five".