6740641 has 4 divisors (see below), whose sum is σ = 6747412. Its totient is φ = 6733872.

The previous prime is 6740597. The next prime is 6740647. The reversal of 6740641 is 1460476.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3240000 + 3500641 = 1800^2 + 1871^2 .

It is a cyclic number.

It is not a de Polignac number, because 6740641 - 2¹³ = 6732449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6740647) 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, 1566 + ... + 3991.

It is an arithmetic number, because the mean of its divisors is an integer number (1686853).

Almost surely, 2^6740641 is an apocalyptic number.

It is an amenable number.

6740641 is a deficient number, since it is larger than the sum of its proper divisors (6771).

6740641 is a wasteful number, since it uses less digits than its factorization.

6740641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6770.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 6740641 is about 2596.2744462017. The cubic root of 6740641 is about 188.9007718912.

It can be divided in two parts, 6740 and 641, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 6740641 in words is "six million, seven hundred forty thousand, six hundred forty-one".