165181103665 has 16 divisors (see below), whose sum is σ = 198783590400. Its totient is φ = 131767544512.

The previous prime is 165181103663. The next prime is 165181103699. The reversal of 165181103665 is 566301181561.

It is a cyclic number.

It is not a de Polignac number, because 165181103665 - 2¹ = 165181103663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165181103663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10561071 + ... + 10576699.

It is an arithmetic number, because the mean of its divisors is an integer number (12423974400).

Almost surely, 2^165181103665 is an apocalyptic number.

It is an amenable number.

165181103665 is a deficient number, since it is larger than the sum of its proper divisors (33602486735).

165181103665 is a wasteful number, since it uses less digits than its factorization.

165181103665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21536.

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

The spelling of 165181103665 in words is "one hundred sixty-five billion, one hundred eighty-one million, one hundred three thousand, six hundred sixty-five".