6698681 has 24 divisors (see below), whose sum is σ = 8043840. Its totient is φ = 5556320.

The previous prime is 6698677. The next prime is 6698687. The reversal of 6698681 is 1868966.

It is not a de Polignac number, because 6698681 - 2² = 6698677 is a prime.

It is a super-2 number, since 2×6698681² = 89744654279522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6698687) 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 23 ways as a sum of consecutive naturals, for example, 80666 + ... + 80748.

It is an arithmetic number, because the mean of its divisors is an integer number (335160).

Almost surely, 2^6698681 is an apocalyptic number.

It is an amenable number.

6698681 is a deficient number, since it is larger than the sum of its proper divisors (1345159).

6698681 is a wasteful number, since it uses less digits than its factorization.

6698681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 146 counting only the distinct ones).

The product of its digits is 124416, while the sum is 44.

The square root of 6698681 is about 2588.1810214898. The cubic root of 6698681 is about 188.5079912276.

The spelling of 6698681 in words is "six million, six hundred ninety-eight thousand, six hundred eighty-one".