6672357320221 has 2 divisors, whose sum is σ = 6672357320222. Its totient is φ = 6672357320220.

The previous prime is 6672357320203. The next prime is 6672357320243. The reversal of 6672357320221 is 1220237532766.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6161882794596 + 510474525625 = 2482314^2 + 714475^2 .

It is a cyclic number.

It is not a de Polignac number, because 6672357320221 - 2⁷ = 6672357320093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6672357320281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3336178660110 + 3336178660111.

It is an arithmetic number, because the mean of its divisors is an integer number (3336178660111).

Almost surely, 2^{6672357320221} is an apocalyptic number.

It is an amenable number.

6672357320221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6672357320221 is an equidigital number, since it uses as much as digits as its factorization.

6672357320221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 46.

The spelling of 6672357320221 in words is "six trillion, six hundred seventy-two billion, three hundred fifty-seven million, three hundred twenty thousand, two hundred twenty-one".