6680321 has 2 divisors, whose sum is σ = 6680322. Its totient is φ = 6680320.

The previous prime is 6680287. The next prime is 6680329. The reversal of 6680321 is 1230866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4243600 + 2436721 = 2060^2 + 1561^2 .

It is a cyclic number.

It is not a de Polignac number, because 6680321 - 2¹⁸ = 6418177 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6680329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3340160 + 3340161.

It is an arithmetic number, because the mean of its divisors is an integer number (3340161).

Almost surely, 2^6680321 is an apocalyptic number.

It is an amenable number.

6680321 is a deficient number, since it is larger than the sum of its proper divisors (1).

6680321 is an equidigital number, since it uses as much as digits as its factorization.

6680321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 6680321 is about 2584.6316952324. The cubic root of 6680321 is about 188.3356103483.

The spelling of 6680321 in words is "six million, six hundred eighty thousand, three hundred twenty-one".