66212455093 has 2 divisors, whose sum is σ = 66212455094. Its totient is φ = 66212455092.

The previous prime is 66212455051. The next prime is 66212455147. The reversal of 66212455093 is 39055421266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38049573969 + 28162881124 = 195063^2 + 167818^2 .

It is a cyclic number.

It is not a de Polignac number, because 66212455093 - 2¹³ = 66212446901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66212455003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33106227546 + 33106227547.

It is an arithmetic number, because the mean of its divisors is an integer number (33106227547).

Almost surely, 2^66212455093 is an apocalyptic number.

It is an amenable number.

66212455093 is a deficient number, since it is larger than the sum of its proper divisors (1).

66212455093 is an equidigital number, since it uses as much as digits as its factorization.

66212455093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 66212455093 in words is "sixty-six billion, two hundred twelve million, four hundred fifty-five thousand, ninety-three".