65637361 has 2 divisors, whose sum is σ = 65637362. Its totient is φ = 65637360.

The previous prime is 65637359. The next prime is 65637379. The reversal of 65637361 is 16373656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61858225 + 3779136 = 7865^2 + 1944^2 .

It is a cyclic number.

It is not a de Polignac number, because 65637361 - 2¹ = 65637359 is a prime.

Together with 65637359, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 65637361.

It is not a weakly prime, because it can be changed into another prime (65637301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32818680 + 32818681.

It is an arithmetic number, because the mean of its divisors is an integer number (32818681).

Almost surely, 2^65637361 is an apocalyptic number.

It is an amenable number.

65637361 is a deficient number, since it is larger than the sum of its proper divisors (1).

65637361 is an equidigital number, since it uses as much as digits as its factorization.

65637361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 37.

The square root of 65637361 is about 8101.6887745704. The cubic root of 65637361 is about 403.3824851118.

It can be divided in two parts, 6563 and 7361, that added together give a square (13924 = 118²).

The spelling of 65637361 in words is "sixty-five million, six hundred thirty-seven thousand, three hundred sixty-one".