165166550240 has 144 divisors (see below), whose sum is σ = 404292845376. Its totient is φ = 63735598080.

The previous prime is 165166550239. The next prime is 165166550243. The reversal of 165166550240 is 42055661561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165166550243) 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 23 ways as a sum of consecutive naturals, for example, 37906142 + ... + 37910498.

It is an arithmetic number, because the mean of its divisors is an integer number (2807589204).

Almost surely, 2^165166550240 is an apocalyptic number.

165166550240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165166550240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202146422688).

165166550240 is an abundant number, since it is smaller than the sum of its proper divisors (239126295136).

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

165166550240 is an equidigital number, since it uses as much as digits as its factorization.

165166550240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4561 (or 4482 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 165166550240 in words is "one hundred sixty-five billion, one hundred sixty-six million, five hundred fifty thousand, two hundred forty".