6328661 has 2 divisors, whose sum is σ = 6328662. Its totient is φ = 6328660.

The previous prime is 6328643. The next prime is 6328669. The reversal of 6328661 is 1668236.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6300100 + 28561 = 2510^2 + 169^2 .

It is a cyclic number.

It is not a de Polignac number, because 6328661 - 2¹⁸ = 6066517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6328669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3164330 + 3164331.

It is an arithmetic number, because the mean of its divisors is an integer number (3164331).

Almost surely, 2^6328661 is an apocalyptic number.

It is an amenable number.

6328661 is a deficient number, since it is larger than the sum of its proper divisors (1).

6328661 is an equidigital number, since it uses as much as digits as its factorization.

6328661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The square root of 6328661 is about 2515.6830086479. The cubic root of 6328661 is about 184.9711277075.

The spelling of 6328661 in words is "six million, three hundred twenty-eight thousand, six hundred sixty-one".