165655117 has 4 divisors (see below), whose sum is σ = 166959616. Its totient is φ = 164350620.

The previous prime is 165655111. The next prime is 165655151. The reversal of 165655117 is 711556561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 711556561 = 43 ⋅16547827.

It is a cyclic number.

It is not a de Polignac number, because 165655117 - 2³ = 165655109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165655111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 652059 + ... + 652312.

It is an arithmetic number, because the mean of its divisors is an integer number (41739904).

Almost surely, 2^165655117 is an apocalyptic number.

It is an amenable number.

165655117 is a deficient number, since it is larger than the sum of its proper divisors (1304499).

165655117 is a wasteful number, since it uses less digits than its factorization.

165655117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304498.

The product of its digits is 31500, while the sum is 37.

The square root of 165655117 is about 12870.7077116995. The cubic root of 165655117 is about 549.2055936274.

The spelling of 165655117 in words is "one hundred sixty-five million, six hundred fifty-five thousand, one hundred seventeen".