165666110232 has 128 divisors (see below), whose sum is σ = 498997002240. Its totient is φ = 44831629440.

The previous prime is 165666110227. The next prime is 165666110251. The reversal of 165666110232 is 232011666561.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 93628 + ... + 583179.

It is an arithmetic number, because the mean of its divisors is an integer number (3898414080).

Almost surely, 2^165666110232 is an apocalyptic number.

165666110232 is a gapful number since it is divisible by the number (12) 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 165666110232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249498501120).

165666110232 is an abundant number, since it is smaller than the sum of its proper divisors (333330892008).

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

165666110232 is a wasteful number, since it uses less digits than its factorization.

165666110232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676901 (or 676897 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

Adding to 165666110232 its reverse (232011666561), we get a palindrome (397677776793).

The spelling of 165666110232 in words is "one hundred sixty-five billion, six hundred sixty-six million, one hundred ten thousand, two hundred thirty-two".