165555338 has 16 divisors (see below), whose sum is σ = 273127680. Its totient is φ = 74783856.

The previous prime is 165555337. The next prime is 165555349. The reversal of 165555338 is 833555561.

It is a happy number.

165555338 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 165555295 and 165555304.

It is not an unprimeable number, because it can be changed into a prime (165555337) 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, 66518 + ... + 68961.

It is an arithmetic number, because the mean of its divisors is an integer number (17070480).

Almost surely, 2^165555338 is an apocalyptic number.

165555338 is a deficient number, since it is larger than the sum of its proper divisors (107572342).

165555338 is a wasteful number, since it uses less digits than its factorization.

165555338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135541.

The product of its digits is 270000, while the sum is 41.

The square root of 165555338 is about 12866.8309229585. The cubic root of 165555338 is about 549.0953038640.

The spelling of 165555338 in words is "one hundred sixty-five million, five hundred fifty-five thousand, three hundred thirty-eight".