66320269 has 2 divisors, whose sum is σ = 66320270. Its totient is φ = 66320268.

The previous prime is 66320251. The next prime is 66320273. The reversal of 66320269 is 96202366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63792169 + 2528100 = 7987^2 + 1590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66320269 is a prime.

It is a super-2 number, since 2×66320269² = 8796756160464722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66320239) 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, 33160134 + 33160135.

It is an arithmetic number, because the mean of its divisors is an integer number (33160135).

Almost surely, 2^66320269 is an apocalyptic number.

It is an amenable number.

66320269 is a deficient number, since it is larger than the sum of its proper divisors (1).

66320269 is an equidigital number, since it uses as much as digits as its factorization.

66320269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 66320269 is about 8143.7257443998. The cubic root of 66320269 is about 404.7766263024.

The spelling of 66320269 in words is "sixty-six million, three hundred twenty thousand, two hundred sixty-nine".