165555960 has 32 divisors (see below), whose sum is σ = 496668240. Its totient is φ = 44148224.

The previous prime is 165555937. The next prime is 165555967. The reversal of 165555960 is 69555561.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165555967) 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 7 ways as a sum of consecutive naturals, for example, 689697 + ... + 689936.

Almost surely, 2^165555960 is an apocalyptic number.

165555960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165555960 is an abundant number, since it is smaller than the sum of its proper divisors (331112280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165555960 is a wasteful number, since it uses less digits than its factorization.

165555960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379647 (or 1379643 counting only the distinct ones).

The product of its (nonzero) digits is 202500, while the sum is 42.

The square root of 165555960 is about 12866.8550936116. The cubic root of 165555960 is about 549.0959915230.

The spelling of 165555960 in words is "one hundred sixty-five million, five hundred fifty-five thousand, nine hundred sixty".