166441343356241 has 2 divisors, whose sum is σ = 166441343356242. Its totient is φ = 166441343356240.

The previous prime is 166441343356237. The next prime is 166441343356307. The reversal of 166441343356241 is 142653343144661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119537048890000 + 46904294466241 = 10933300^2 + 6848671^2 .

It is a cyclic number.

It is not a de Polignac number, because 166441343356241 - 2² = 166441343356237 is a prime.

It is a super-2 number, since 2×166441343356241² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166441343350241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83220671678120 + 83220671678121.

It is an arithmetic number, because the mean of its divisors is an integer number (83220671678121).

Almost surely, 2^{166441343356241} is an apocalyptic number.

It is an amenable number.

166441343356241 is a deficient number, since it is larger than the sum of its proper divisors (1).

166441343356241 is an equidigital number, since it uses as much as digits as its factorization.

166441343356241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14929920, while the sum is 53.

The spelling of 166441343356241 in words is "one hundred sixty-six trillion, four hundred forty-one billion, three hundred forty-three million, three hundred fifty-six thousand, two hundred forty-one".