6373166221 has 2 divisors, whose sum is σ = 6373166222. Its totient is φ = 6373166220.

The previous prime is 6373166183. The next prime is 6373166243. The reversal of 6373166221 is 1226613736.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4490474121 + 1882692100 = 67011^2 + 43390^2 .

It is a cyclic number.

It is not a de Polignac number, because 6373166221 - 2⁹ = 6373165709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6373166281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3186583110 + 3186583111.

It is an arithmetic number, because the mean of its divisors is an integer number (3186583111).

Almost surely, 2^6373166221 is an apocalyptic number.

It is an amenable number.

6373166221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6373166221 is an equidigital number, since it uses as much as digits as its factorization.

6373166221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 37.

The square root of 6373166221 is about 79832.1127178781. The cubic root of 6373166221 is about 1854.0370782856.

Adding to 6373166221 its reverse (1226613736), we get a palindrome (7599779957).

The spelling of 6373166221 in words is "six billion, three hundred seventy-three million, one hundred sixty-six thousand, two hundred twenty-one".