11665056165551 has 2 divisors, whose sum is σ = 11665056165552. Its totient is φ = 11665056165550.

The previous prime is 11665056165541. The next prime is 11665056165569. The reversal of 11665056165551 is 15556165056611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11665056165551 - 2¹⁰ = 11665056164527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11665056165493 and 11665056165502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11665056165541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5832528082775 + 5832528082776.

It is an arithmetic number, because the mean of its divisors is an integer number (5832528082776).

Almost surely, 2^{11665056165551} is an apocalyptic number.

11665056165551 is a deficient number, since it is larger than the sum of its proper divisors (1).

11665056165551 is an equidigital number, since it uses as much as digits as its factorization.

11665056165551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4050000, while the sum is 53.

The spelling of 11665056165551 in words is "eleven trillion, six hundred sixty-five billion, fifty-six million, one hundred sixty-five thousand, five hundred fifty-one".