65006540 has 48 divisors (see below), whose sum is σ = 140706720. Its totient is φ = 25213440.

The previous prime is 65006537. The next prime is 65006561. The reversal of 65006540 is 4560056.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231200 + ... + 231480.

It is an arithmetic number, because the mean of its divisors is an integer number (2931390).

Almost surely, 2^65006540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65006540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70353360).

65006540 is an abundant number, since it is smaller than the sum of its proper divisors (75700180).

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

65006540 is a wasteful number, since it uses less digits than its factorization.

65006540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602 (or 600 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 65006540 is about 8062.6633316789. The cubic root of 65006540 is about 402.0860603023.

Adding to 65006540 its reverse (4560056), we get a palindrome (69566596).

The spelling of 65006540 in words is "sixty-five million, six thousand, five hundred forty".