165065490 has 48 divisors (see below), whose sum is σ = 431098200. Its totient is φ = 43819776.

The previous prime is 165065489. The next prime is 165065497. The reversal of 165065490 is 94560561.

165065490 is a `hidden beast` number, since 16 + 506 + 54 + 90 = 666.

165065490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 162333081 + 2732409 = 12741^2 + 1653^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165065497) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16606 + ... + 24614.

Almost surely, 2^165065490 is an apocalyptic number.

165065490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 165065490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215549100).

165065490 is an abundant number, since it is smaller than the sum of its proper divisors (266032710).

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

165065490 is a wasteful number, since it uses less digits than its factorization.

165065490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8251 (or 8248 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 165065490 is about 12847.7815205583. The cubic root of 165065490 is about 548.5532112975.

The spelling of 165065490 in words is "one hundred sixty-five million, sixty-five thousand, four hundred ninety".