65775197 has 2 divisors, whose sum is σ = 65775198. Its totient is φ = 65775196.

The previous prime is 65775179. The next prime is 65775209. The reversal of 65775197 is 79157756.

Together with previous prime (65775179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65626201 + 148996 = 8101^2 + 386^2 .

It is a cyclic number.

It is not a de Polignac number, because 65775197 - 2¹⁶ = 65709661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65775097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32887598 + 32887599.

It is an arithmetic number, because the mean of its divisors is an integer number (32887599).

Almost surely, 2^65775197 is an apocalyptic number.

It is an amenable number.

65775197 is a deficient number, since it is larger than the sum of its proper divisors (1).

65775197 is an equidigital number, since it uses as much as digits as its factorization.

65775197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 463050, while the sum is 47.

The square root of 65775197 is about 8110.1909348671. The cubic root of 65775197 is about 403.6646503957.

The spelling of 65775197 in words is "sixty-five million, seven hundred seventy-five thousand, one hundred ninety-seven".