165406752 has 144 divisors (see below), whose sum is σ = 561345120. Its totient is φ = 47246976.

The previous prime is 165406739. The next prime is 165406763. The reversal of 165406752 is 257604561.

It is a happy number.

165406752 is a `hidden beast` number, since 1 + 6 + 540 + 67 + 52 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 40383 + ... + 44289.

It is an arithmetic number, because the mean of its divisors is an integer number (3898230).

Almost surely, 2^165406752 is an apocalyptic number.

165406752 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 165406752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280672560).

165406752 is an abundant number, since it is smaller than the sum of its proper divisors (395938368).

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

165406752 is a wasteful number, since it uses less digits than its factorization.

165406752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3940 (or 3919 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 165406752 is about 12861.0556331897. The cubic root of 165406752 is about 548.9309835902.

The spelling of 165406752 in words is "one hundred sixty-five million, four hundred six thousand, seven hundred fifty-two".