65334521 has 16 divisors (see below), whose sum is σ = 79349760. Its totient is φ = 52546320.

The previous prime is 65334509. The next prime is 65334523. The reversal of 65334521 is 12543356.

It is a cyclic number.

It is not a de Polignac number, because 65334521 - 2⁶ = 65334457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65334523) 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 15 ways as a sum of consecutive naturals, for example, 11936 + ... + 16526.

It is an arithmetic number, because the mean of its divisors is an integer number (4959360).

Almost surely, 2^65334521 is an apocalyptic number.

It is an amenable number.

65334521 is a deficient number, since it is larger than the sum of its proper divisors (14015239).

65334521 is a wasteful number, since it uses less digits than its factorization.

65334521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4724.

The product of its digits is 10800, while the sum is 29.

The square root of 65334521 is about 8082.9772361426. The cubic root of 65334521 is about 402.7611483765.

Adding to 65334521 its reverse (12543356), we get a palindrome (77877877).

The spelling of 65334521 in words is "sixty-five million, three hundred thirty-four thousand, five hundred twenty-one".