65079521 has 8 divisors (see below), whose sum is σ = 70599144. Its totient is φ = 59633280.

The previous prime is 65079517. The next prime is 65079527. The reversal of 65079521 is 12597056.

It can be written as a sum of positive squares in 4 ways, for example, as 16289296 + 48790225 = 4036^2 + 6985^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65079521 - 2² = 65079517 is a prime.

It is a super-3 number, since 3×65079521³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65079527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16490 + ... + 20051.

It is an arithmetic number, because the mean of its divisors is an integer number (8824893).

Almost surely, 2^65079521 is an apocalyptic number.

It is an amenable number.

65079521 is a deficient number, since it is larger than the sum of its proper divisors (5519623).

65079521 is a wasteful number, since it uses less digits than its factorization.

65079521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36691.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 65079521 is about 8067.1879239299. The cubic root of 65079521 is about 402.2364742357.

The spelling of 65079521 in words is "sixty-five million, seventy-nine thousand, five hundred twenty-one".