16611560065655 has 8 divisors (see below), whose sum is σ = 20800562169312. Its totient is φ = 12711454658848.

The previous prime is 16611560065493. The next prime is 16611560065657. The reversal of 16611560065655 is 55656006511661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16611560065655 - 2¹⁸ = 16611559803511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16611560065597 and 16611560065606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16611560065657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72224174084 + ... + 72224174313.

It is an arithmetic number, because the mean of its divisors is an integer number (2600070271164).

Almost surely, 2^{16611560065655} is an apocalyptic number.

16611560065655 is a deficient number, since it is larger than the sum of its proper divisors (4189002103657).

16611560065655 is a wasteful number, since it uses less digits than its factorization.

16611560065655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144448348425.

The product of its (nonzero) digits is 4860000, while the sum is 53.

The spelling of 16611560065655 in words is "sixteen trillion, six hundred eleven billion, five hundred sixty million, sixty-five thousand, six hundred fifty-five".