11661161666053 has 2 divisors, whose sum is σ = 11661161666054. Its totient is φ = 11661161666052.

The previous prime is 11661161666039. The next prime is 11661161666117. The reversal of 11661161666053 is 35066616116611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5947828359489 + 5713333306564 = 2438817^2 + 2390258^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11661161666053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11661161665988 and 11661161666006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11661161666153) 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, 5830580833026 + 5830580833027.

It is an arithmetic number, because the mean of its divisors is an integer number (5830580833027).

Almost surely, 2^{11661161666053} is an apocalyptic number.

It is an amenable number.

11661161666053 is a deficient number, since it is larger than the sum of its proper divisors (1).

11661161666053 is an equidigital number, since it uses as much as digits as its factorization.

11661161666053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 699840, while the sum is 49.

The spelling of 11661161666053 in words is "eleven trillion, six hundred sixty-one billion, one hundred sixty-one million, six hundred sixty-six thousand, fifty-three".