6611505164161 has 2 divisors, whose sum is σ = 6611505164162. Its totient is φ = 6611505164160.

The previous prime is 6611505164149. The next prime is 6611505164183. The reversal of 6611505164161 is 1614615051166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4374853308225 + 2236651855936 = 2091615^2 + 1495544^2 .

It is a cyclic number.

It is not a de Polignac number, because 6611505164161 - 2⁵ = 6611505164129 is a prime.

It is a super-3 number, since 3×6611505164161³ (a number of 39 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (6611505164111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3305752582080 + 3305752582081.

It is an arithmetic number, because the mean of its divisors is an integer number (3305752582081).

Almost surely, 2^{6611505164161} is an apocalyptic number.

It is an amenable number.

6611505164161 is a deficient number, since it is larger than the sum of its proper divisors (1).

6611505164161 is an equidigital number, since it uses as much as digits as its factorization.

6611505164161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 43.

The spelling of 6611505164161 in words is "six trillion, six hundred eleven billion, five hundred five million, one hundred sixty-four thousand, one hundred sixty-one".