65883221 has 2 divisors, whose sum is σ = 65883222. Its totient is φ = 65883220.

The previous prime is 65883179. The next prime is 65883239. The reversal of 65883221 is 12238856.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65836996 + 46225 = 8114^2 + 215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65883221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65883271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32941610 + 32941611.

It is an arithmetic number, because the mean of its divisors is an integer number (32941611).

Almost surely, 2^65883221 is an apocalyptic number.

It is an amenable number.

65883221 is a deficient number, since it is larger than the sum of its proper divisors (1).

65883221 is an equidigital number, since it uses as much as digits as its factorization.

65883221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 35.

The square root of 65883221 is about 8116.8479719655. The cubic root of 65883221 is about 403.8855118681.

The spelling of 65883221 in words is "sixty-five million, eight hundred eighty-three thousand, two hundred twenty-one".