66283313 has 2 divisors, whose sum is σ = 66283314. Its totient is φ = 66283312.

The previous prime is 66283279. The next prime is 66283331. The reversal of 66283313 is 31338266.

Together with next prime (66283331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35724529 + 30558784 = 5977^2 + 5528^2 .

It is a cyclic number.

It is not a de Polignac number, because 66283313 - 2⁸ = 66283057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66283313.

It is not a weakly prime, because it can be changed into another prime (66283333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33141656 + 33141657.

It is an arithmetic number, because the mean of its divisors is an integer number (33141657).

Almost surely, 2^66283313 is an apocalyptic number.

It is an amenable number.

66283313 is a deficient number, since it is larger than the sum of its proper divisors (1).

66283313 is an equidigital number, since it uses as much as digits as its factorization.

66283313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 32.

The square root of 66283313 is about 8141.4564421853. The cubic root of 66283313 is about 404.7014270476.

The spelling of 66283313 in words is "sixty-six million, two hundred eighty-three thousand, three hundred thirteen".