6647741 has 2 divisors, whose sum is σ = 6647742. Its totient is φ = 6647740.

The previous prime is 6647717. The next prime is 6647743. The reversal of 6647741 is 1477466.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6528025 + 119716 = 2555^2 + 346^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6647741 is a prime.

Together with 6647743, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6647743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3323870 + 3323871.

It is an arithmetic number, because the mean of its divisors is an integer number (3323871).

Almost surely, 2^6647741 is an apocalyptic number.

It is an amenable number.

6647741 is a deficient number, since it is larger than the sum of its proper divisors (1).

6647741 is an equidigital number, since it uses as much as digits as its factorization.

6647741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 35.

The square root of 6647741 is about 2578.3213531288. The cubic root of 6647741 is about 188.0289396373.

The spelling of 6647741 in words is "six million, six hundred forty-seven thousand, seven hundred forty-one".