66298753889 has 2 divisors, whose sum is σ = 66298753890. Its totient is φ = 66298753888.

The previous prime is 66298753841. The next prime is 66298753993. The reversal of 66298753889 is 98835789266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40278483025 + 26020270864 = 200695^2 + 161308^2 .

It is a cyclic number.

It is not a de Polignac number, because 66298753889 - 2²⁸ = 66030318433 is a prime.

It is not a weakly prime, because it can be changed into another prime (66298753489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33149376944 + 33149376945.

It is an arithmetic number, because the mean of its divisors is an integer number (33149376945).

Almost surely, 2^66298753889 is an apocalyptic number.

It is an amenable number.

66298753889 is a deficient number, since it is larger than the sum of its proper divisors (1).

66298753889 is an equidigital number, since it uses as much as digits as its factorization.

66298753889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 313528320, while the sum is 71.

The spelling of 66298753889 in words is "sixty-six billion, two hundred ninety-eight million, seven hundred fifty-three thousand, eight hundred eighty-nine".