65183706221 has 2 divisors, whose sum is σ = 65183706222. Its totient is φ = 65183706220.

The previous prime is 65183706143. The next prime is 65183706223. The reversal of 65183706221 is 12260738156.

65183706221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65095909321 + 87796900 = 255139^2 + 9370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65183706221 is a prime.

Together with 65183706223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65183706223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32591853110 + 32591853111.

It is an arithmetic number, because the mean of its divisors is an integer number (32591853111).

Almost surely, 2^65183706221 is an apocalyptic number.

It is an amenable number.

65183706221 is a deficient number, since it is larger than the sum of its proper divisors (1).

65183706221 is an equidigital number, since it uses as much as digits as its factorization.

65183706221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 65183706221 in words is "sixty-five billion, one hundred eighty-three million, seven hundred six thousand, two hundred twenty-one".