65504881 has 16 divisors (see below), whose sum is σ = 73382400. Its totient is φ = 58056768.

The previous prime is 65504869. The next prime is 65504903. The reversal of 65504881 is 18840556.

65504881 is nontrivially palindromic in base 6.

It is a cyclic number.

It is not a de Polignac number, because 65504881 - 2⁵ = 65504849 is a prime.

It is a super-2 number, since 2×65504881² = 8581778869648322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65504881.

It is not an unprimeable number, because it can be changed into a prime (65504861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89740 + ... + 90466.

It is an arithmetic number, because the mean of its divisors is an integer number (4586400).

Almost surely, 2^65504881 is an apocalyptic number.

It is an amenable number.

65504881 is a deficient number, since it is larger than the sum of its proper divisors (7877519).

65504881 is a wasteful number, since it uses less digits than its factorization.

65504881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008.

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 65504881 is about 8093.5085716888. The cubic root of 65504881 is about 403.1109116003.

The spelling of 65504881 in words is "sixty-five million, five hundred four thousand, eight hundred eighty-one".