7686861 has 32 divisors (see below), whose sum is σ = 12972288. Its totient is φ = 3939840.

The previous prime is 7686859. The next prime is 7686863. The reversal of 7686861 is 1686867.

It is an interprime number because it is at equal distance from previous prime (7686859) and next prime (7686863).

It is not a de Polignac number, because 7686861 - 2¹ = 7686859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7686863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9721 + ... + 10481.

It is an arithmetic number, because the mean of its divisors is an integer number (405384).

Almost surely, 2^7686861 is an apocalyptic number.

It is an amenable number.

7686861 is a deficient number, since it is larger than the sum of its proper divisors (5285427).

7686861 is a wasteful number, since it uses less digits than its factorization.

7686861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821.

The product of its digits is 96768, while the sum is 42.

The square root of 7686861 is about 2772.5188908283. The cubic root of 7686861 is about 197.3557008242.

The spelling of 7686861 in words is "seven million, six hundred eighty-six thousand, eight hundred sixty-one".