66354313 has 2 divisors, whose sum is σ = 66354314. Its totient is φ = 66354312.

The previous prime is 66354311. The next prime is 66354341. The reversal of 66354313 is 31345366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52012944 + 14341369 = 7212^2 + 3787^2 .

It is a cyclic number.

It is not a de Polignac number, because 66354313 - 2¹ = 66354311 is a prime.

Together with 66354311, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66354311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33177156 + 33177157.

It is an arithmetic number, because the mean of its divisors is an integer number (33177157).

Almost surely, 2^66354313 is an apocalyptic number.

It is an amenable number.

66354313 is a deficient number, since it is larger than the sum of its proper divisors (1).

66354313 is an equidigital number, since it uses as much as digits as its factorization.

66354313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 31.

The square root of 66354313 is about 8145.8156743202. The cubic root of 66354313 is about 404.8458754094.

Adding to 66354313 its reverse (31345366), we get a palindrome (97699679).

The spelling of 66354313 in words is "sixty-six million, three hundred fifty-four thousand, three hundred thirteen".