65508081 has 8 divisors (see below), whose sum is σ = 87464640. Its totient is φ = 43611792.

The previous prime is 65508031. The next prime is 65508097. The reversal of 65508081 is 18080556.

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

It is not a de Polignac number, because 65508081 - 2¹¹ = 65506033 is a prime.

It is a super-2 number, since 2×65508081² = 8582617352605122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65508011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12466 + ... + 16923.

It is an arithmetic number, because the mean of its divisors is an integer number (10933080).

Almost surely, 2^65508081 is an apocalyptic number.

It is an amenable number.

65508081 is a deficient number, since it is larger than the sum of its proper divisors (21956559).

65508081 is a wasteful number, since it uses less digits than its factorization.

65508081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30135.

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 65508081 is about 8093.7062585691. The cubic root of 65508081 is about 403.1174756603.

The spelling of 65508081 in words is "sixty-five million, five hundred eight thousand, eighty-one".