165501126 has 72 divisors (see below), whose sum is σ = 430657344. Its totient is φ = 45753120.

The previous prime is 165501101. The next prime is 165501143. The reversal of 165501126 is 621105561.

It is a happy number.

165501126 is a `hidden beast` number, since 1 + 655 + 0 + 1 + 1 + 2 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 165501126.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 24316 + ... + 30368.

It is an arithmetic number, because the mean of its divisors is an integer number (5981352).

Almost surely, 2^165501126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165501126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215328672).

165501126 is an abundant number, since it is smaller than the sum of its proper divisors (265156218).

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

165501126 is a wasteful number, since it uses less digits than its factorization.

165501126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6106 (or 6096 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 165501126 is about 12864.7240934270. The cubic root of 165501126 is about 549.0353625683.

Adding to 165501126 its reverse (621105561), we get a palindrome (786606687).

The spelling of 165501126 in words is "one hundred sixty-five million, five hundred one thousand, one hundred twenty-six".