65520361 has 2 divisors, whose sum is σ = 65520362. Its totient is φ = 65520360.

The previous prime is 65520359. The next prime is 65520373. The reversal of 65520361 is 16302556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55785961 + 9734400 = 7469^2 + 3120^2 .

It is a cyclic number.

It is not a de Polignac number, because 65520361 - 2¹ = 65520359 is a prime.

Together with 65520359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (65520331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32760180 + 32760181.

It is an arithmetic number, because the mean of its divisors is an integer number (32760181).

Almost surely, 2^65520361 is an apocalyptic number.

It is an amenable number.

65520361 is a deficient number, since it is larger than the sum of its proper divisors (1).

65520361 is an equidigital number, since it uses as much as digits as its factorization.

65520361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 65520361 is about 8094.4648371588. The cubic root of 65520361 is about 403.1426632567.

The spelling of 65520361 in words is "sixty-five million, five hundred twenty thousand, three hundred sixty-one".