165174720 has 224 divisors, whose sum is σ = 576072000. Its totient is φ = 39911424.

The previous prime is 165174683. The next prime is 165174721. The reversal of 165174720 is 27471561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165174721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 473106 + ... + 473454.

It is an arithmetic number, because the mean of its divisors is an integer number (2571750).

Almost surely, 2^165174720 is an apocalyptic number.

165174720 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 165174720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288036000).

165174720 is an abundant number, since it is smaller than the sum of its proper divisors (410897280).

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

165174720 is a wasteful number, since it uses less digits than its factorization.

165174720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 165174720 is about 12852.0317459925. The cubic root of 165174720 is about 548.6741840002.

The spelling of 165174720 in words is "one hundred sixty-five million, one hundred seventy-four thousand, seven hundred twenty".