53266666217 has 2 divisors, whose sum is σ = 53266666218. Its totient is φ = 53266666216.

The previous prime is 53266666183. The next prime is 53266666237. The reversal of 53266666217 is 71266666235.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50886787561 + 2379878656 = 225581^2 + 48784^2 .

It is a cyclic number.

It is not a de Polignac number, because 53266666217 - 2⁶ = 53266666153 is a prime.

It is not a weakly prime, because it can be changed into another prime (53266666237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26633333108 + 26633333109.

It is an arithmetic number, because the mean of its divisors is an integer number (26633333109).

Almost surely, 2^53266666217 is an apocalyptic number.

It is an amenable number.

53266666217 is a deficient number, since it is larger than the sum of its proper divisors (1).

53266666217 is an equidigital number, since it uses as much as digits as its factorization.

53266666217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 50.

The spelling of 53266666217 in words is "fifty-three billion, two hundred sixty-six million, six hundred sixty-six thousand, two hundred seventeen".