6740005 has 4 divisors (see below), whose sum is σ = 8088012. Its totient is φ = 5392000.

The previous prime is 6739987. The next prime is 6740021. The reversal of 6740005 is 5000476.

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 5157441 + 1582564 = 2271^2 + 1258^2 .

It is not a de Polignac number, because 6740005 - 2⁷ = 6739877 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 673996 + ... + 674005.

It is an arithmetic number, because the mean of its divisors is an integer number (2022003).

Almost surely, 2^6740005 is an apocalyptic number.

It is an amenable number.

6740005 is a deficient number, since it is larger than the sum of its proper divisors (1348007).

6740005 is a wasteful number, since it uses less digits than its factorization.

6740005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348006.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 6740005 is about 2596.1519601133. The cubic root of 6740005 is about 188.8948305833.

The spelling of 6740005 in words is "six million, seven hundred forty thousand, five".