17364066221 has 2 divisors, whose sum is σ = 17364066222. Its totient is φ = 17364066220.

The previous prime is 17364066217. The next prime is 17364066259. The reversal of 17364066221 is 12266046371.

It is a happy number.

It is an a-pointer prime, because the next prime (17364066259) can be obtained adding 17364066221 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9386896996 + 7977169225 = 96886^2 + 89315^2 .

It is a cyclic number.

It is not a de Polignac number, because 17364066221 - 2² = 17364066217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17364066281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8682033110 + 8682033111.

It is an arithmetic number, because the mean of its divisors is an integer number (8682033111).

Almost surely, 2^17364066221 is an apocalyptic number.

It is an amenable number.

17364066221 is a deficient number, since it is larger than the sum of its proper divisors (1).

17364066221 is an equidigital number, since it uses as much as digits as its factorization.

17364066221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 38.

The spelling of 17364066221 in words is "seventeen billion, three hundred sixty-four million, sixty-six thousand, two hundred twenty-one".