165550660500 has 96 divisors (see below), whose sum is σ = 485764126848. Its totient is φ = 43809792000.

The previous prime is 165550660489. The next prime is 165550660507. The reversal of 165550660500 is 5066055561.

165550660500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165550660507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 224749 + ... + 617748.

It is an arithmetic number, because the mean of its divisors is an integer number (5060042988).

Almost surely, 2^165550660500 is an apocalyptic number.

165550660500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165550660500 is an abundant number, since it is smaller than the sum of its proper divisors (320213466348).

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

165550660500 is a wasteful number, since it uses less digits than its factorization.

165550660500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842650 (or 842638 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 39.

The spelling of 165550660500 in words is "one hundred sixty-five billion, five hundred fifty million, six hundred sixty thousand, five hundred".