66136313 has 2 divisors, whose sum is σ = 66136314. Its totient is φ = 66136312.

The previous prime is 66136297. The next prime is 66136331. The reversal of 66136313 is 31363166.

Together with next prime (66136331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66129424 + 6889 = 8132^2 + 83^2 .

It is a cyclic number.

It is not a de Polignac number, because 66136313 - 2⁴ = 66136297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (66136333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33068156 + 33068157.

It is an arithmetic number, because the mean of its divisors is an integer number (33068157).

Almost surely, 2^66136313 is an apocalyptic number.

It is an amenable number.

66136313 is a deficient number, since it is larger than the sum of its proper divisors (1).

66136313 is an equidigital number, since it uses as much as digits as its factorization.

66136313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 29.

The square root of 66136313 is about 8132.4235625058. The cubic root of 66136313 is about 404.4020297071.

Adding to 66136313 its reverse (31363166), we get a palindrome (97499479).

The spelling of 66136313 in words is "sixty-six million, one hundred thirty-six thousand, three hundred thirteen".