165065550 has 48 divisors (see below), whose sum is σ = 440857200. Its totient is φ = 40631040.

The previous prime is 165065543. The next prime is 165065587. The reversal of 165065550 is 55560561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40375 + ... + 44274.

It is an arithmetic number, because the mean of its divisors is an integer number (9184525).

Almost surely, 2^165065550 is an apocalyptic number.

165065550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165065550 is an abundant number, since it is smaller than the sum of its proper divisors (275791650).

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

165065550 is a wasteful number, since it uses less digits than its factorization.

165065550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84677 (or 84672 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 165065550 is about 12847.7838555916. The cubic root of 165065550 is about 548.5532777624.

The spelling of 165065550 in words is "one hundred sixty-five million, sixty-five thousand, five hundred fifty".