65987538 has 16 divisors (see below), whose sum is σ = 132559200. Its totient is φ = 21898496.

The previous prime is 65987531. The next prime is 65987587. The reversal of 65987538 is 83578956.

It is not an unprimeable number, because it can be changed into a prime (65987531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22863 + ... + 25586.

It is an arithmetic number, because the mean of its divisors is an integer number (8284950).

Almost surely, 2^65987538 is an apocalyptic number.

65987538 is an abundant number, since it is smaller than the sum of its proper divisors (66571662).

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

65987538 is a wasteful number, since it uses less digits than its factorization.

65987538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48681.

The product of its digits is 1814400, while the sum is 51.

The square root of 65987538 is about 8123.2713853472. The cubic root of 65987538 is about 404.0985651414.

The spelling of 65987538 in words is "sixty-five million, nine hundred eighty-seven thousand, five hundred thirty-eight".