65580481 has 2 divisors, whose sum is σ = 65580482. Its totient is φ = 65580480.

The previous prime is 65580401. The next prime is 65580497. The reversal of 65580481 is 18408556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56490256 + 9090225 = 7516^2 + 3015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65580481 is a prime.

It is a super-2 number, since 2×65580481² = 8601598976382722, which contains 22 as substring.

It is equal to p_3872809 and since 65580481 and 3872809 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65580481.

It is not a weakly prime, because it can be changed into another prime (65580401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32790240 + 32790241.

It is an arithmetic number, because the mean of its divisors is an integer number (32790241).

Almost surely, 2^65580481 is an apocalyptic number.

It is an amenable number.

65580481 is a deficient number, since it is larger than the sum of its proper divisors (1).

65580481 is an equidigital number, since it uses as much as digits as its factorization.

65580481 is an evil number, because the sum of its binary digits is even.

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

The square root of 65580481 is about 8098.1776345052. The cubic root of 65580481 is about 403.2659304224.

The spelling of 65580481 in words is "sixty-five million, five hundred eighty thousand, four hundred eighty-one".