65691953 has 2 divisors, whose sum is σ = 65691954. Its totient is φ = 65691952.

The previous prime is 65691943. The next prime is 65691991. The reversal of 65691953 is 35919656.

65691953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53699584 + 11992369 = 7328^2 + 3463^2 .

It is a cyclic number.

It is not a de Polignac number, because 65691953 - 2⁶ = 65691889 is a prime.

It is not a weakly prime, because it can be changed into another prime (65691943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32845976 + 32845977.

It is an arithmetic number, because the mean of its divisors is an integer number (32845977).

Almost surely, 2^65691953 is an apocalyptic number.

It is an amenable number.

65691953 is a deficient number, since it is larger than the sum of its proper divisors (1).

65691953 is an equidigital number, since it uses as much as digits as its factorization.

65691953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 218700, while the sum is 44.

The square root of 65691953 is about 8105.0572484098. The cubic root of 65691953 is about 403.4942880742.

The spelling of 65691953 in words is "sixty-five million, six hundred ninety-one thousand, nine hundred fifty-three".