65845530 has 48 divisors (see below), whose sum is σ = 172228680. Its totient is φ = 17453184.

The previous prime is 65845529. The next prime is 65845537. The reversal of 65845530 is 3554856.

It can be written as a sum of positive squares in 4 ways, for example, as 64593369 + 1252161 = 8037^2 + 1119^2 .

It is not an unprimeable number, because it can be changed into a prime (65845537) 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, 13456 + ... + 17684.

Almost surely, 2^65845530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65845530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86114340).

65845530 is an abundant number, since it is smaller than the sum of its proper divisors (106383150).

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

65845530 is a wasteful number, since it uses less digits than its factorization.

65845530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4415 (or 4412 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 65845530 is about 8114.5258641525. The cubic root of 65845530 is about 403.8084778248.

The spelling of 65845530 in words is "sixty-five million, eight hundred forty-five thousand, five hundred thirty".