65330191 has 2 divisors, whose sum is σ = 65330192. Its totient is φ = 65330190.

The previous prime is 65330149. The next prime is 65330203. The reversal of 65330191 is 19103356.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65330191 - 2¹¹ = 65328143 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65330101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32665095 + 32665096.

It is an arithmetic number, because the mean of its divisors is an integer number (32665096).

Almost surely, 2^65330191 is an apocalyptic number.

65330191 is a deficient number, since it is larger than the sum of its proper divisors (1).

65330191 is an equidigital number, since it uses as much as digits as its factorization.

65330191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 65330191 is about 8082.7093848536. The cubic root of 65330191 is about 402.7522506082.

The spelling of 65330191 in words is "sixty-five million, three hundred thirty thousand, one hundred ninety-one".