6694681 has 4 divisors (see below), whose sum is σ = 7651072. Its totient is φ = 5738292.

The previous prime is 6694673. The next prime is 6694687. The reversal of 6694681 is 1864966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1864966 = 2 ⋅932483.

It is not a de Polignac number, because 6694681 - 2³ = 6694673 is a prime.

It is a super-2 number, since 2×6694681² = 89637507383522, 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 (6694687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478185 + ... + 478198.

It is an arithmetic number, because the mean of its divisors is an integer number (1912768).

Almost surely, 2^6694681 is an apocalyptic number.

It is an amenable number.

6694681 is a deficient number, since it is larger than the sum of its proper divisors (956391).

6694681 is an equidigital number, since it uses as much as digits as its factorization.

6694681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956390.

The product of its digits is 62208, while the sum is 40.

The square root of 6694681 is about 2587.4081626214. The cubic root of 6694681 is about 188.4704623419.

The spelling of 6694681 in words is "six million, six hundred ninety-four thousand, six hundred eighty-one".