6681373 has 4 divisors (see below), whose sum is σ = 6742780. Its totient is φ = 6619968.

The previous prime is 6681361. The next prime is 6681377. The reversal of 6681373 is 3731866.

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 3229209 + 3452164 = 1797^2 + 1858^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6681373 is a prime.

It is a Duffinian number.

6681373 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6681377) 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, 30540 + ... + 30757.

It is an arithmetic number, because the mean of its divisors is an integer number (1685695).

Almost surely, 2^6681373 is an apocalyptic number.

It is an amenable number.

6681373 is a deficient number, since it is larger than the sum of its proper divisors (61407).

6681373 is a wasteful number, since it uses less digits than its factorization.

6681373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61406.

The product of its digits is 18144, while the sum is 34.

The square root of 6681373 is about 2584.8351978414. The cubic root of 6681373 is about 188.3454960341.

The spelling of 6681373 in words is "six million, six hundred eighty-one thousand, three hundred seventy-three".