165272720 has 40 divisors (see below), whose sum is σ = 387308544. Its totient is φ = 65584512.

The previous prime is 165272717. The next prime is 165272741. The reversal of 165272720 is 27272561.

165272720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2027 + ... + 18293.

Almost surely, 2^165272720 is an apocalyptic number.

165272720 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 165272720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193654272).

165272720 is an abundant number, since it is smaller than the sum of its proper divisors (222035824).

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

165272720 is a wasteful number, since it uses less digits than its factorization.

165272720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16407 (or 16401 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 165272720 is about 12855.8438073897. The cubic root of 165272720 is about 548.7826740472.

The spelling of 165272720 in words is "one hundred sixty-five million, two hundred seventy-two thousand, seven hundred twenty".