66343313 has 4 divisors (see below), whose sum is σ = 66428400. Its totient is φ = 66258228.

The previous prime is 66343309. The next prime is 66343337. The reversal of 66343313 is 31334366.

66343313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66343313 - 2² = 66343309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66343373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41363 + ... + 42936.

It is an arithmetic number, because the mean of its divisors is an integer number (16607100).

Almost surely, 2^66343313 is an apocalyptic number.

It is an amenable number.

66343313 is a deficient number, since it is larger than the sum of its proper divisors (85087).

66343313 is an equidigital number, since it uses as much as digits as its factorization.

66343313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85086.

The product of its digits is 11664, while the sum is 29.

The square root of 66343313 is about 8145.1404530554. The cubic root of 66343313 is about 404.8235028334.

Adding to 66343313 its reverse (31334366), we get a palindrome (97677679).

The spelling of 66343313 in words is "sixty-six million, three hundred forty-three thousand, three hundred thirteen".