166464545464361 has 2 divisors, whose sum is σ = 166464545464362. Its totient is φ = 166464545464360.

The previous prime is 166464545464333. The next prime is 166464545464367. The reversal of 166464545464361 is 163464545464661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160060831795225 + 6403713669136 = 12651515^2 + 2530556^2 .

It is a cyclic number.

It is not a de Polignac number, because 166464545464361 - 2¹⁸ = 166464545202217 is a prime.

It is a super-2 number, since 2×166464545464361² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166464545464367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83232272732180 + 83232272732181.

It is an arithmetic number, because the mean of its divisors is an integer number (83232272732181).

Almost surely, 2^{166464545464361} is an apocalyptic number.

It is an amenable number.

166464545464361 is a deficient number, since it is larger than the sum of its proper divisors (1).

166464545464361 is an equidigital number, since it uses as much as digits as its factorization.

166464545464361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 597196800, while the sum is 65.

The spelling of 166464545464361 in words is "one hundred sixty-six trillion, four hundred sixty-four billion, five hundred forty-five million, four hundred sixty-four thousand, three hundred sixty-one".