65330540 has 48 divisors (see below), whose sum is σ = 150746400. Its totient is φ = 23585280.

The previous prime is 65330527. The next prime is 65330581. The reversal of 65330540 is 4503356.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31784 + ... + 33776.

It is an arithmetic number, because the mean of its divisors is an integer number (3140550).

Almost surely, 2^65330540 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 65330540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75373200).

65330540 is an abundant number, since it is smaller than the sum of its proper divisors (85415860).

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

65330540 is a wasteful number, since it uses less digits than its factorization.

65330540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2162 (or 2160 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 65330540 is about 8082.7309741201. The cubic root of 65330540 is about 402.7529677870.

Adding to 65330540 its reverse (4503356), we get a palindrome (69833896).

The spelling of 65330540 in words is "sixty-five million, three hundred thirty thousand, five hundred forty".