66668313 has 8 divisors (see below), whose sum is σ = 89023968. Its totient is φ = 44379104.

The previous prime is 66668309. The next prime is 66668317. The reversal of 66668313 is 31386666.

It is an interprime number because it is at equal distance from previous prime (66668309) and next prime (66668317).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66668313 - 2² = 66668309 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66668317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14220 + ... + 18317.

It is an arithmetic number, because the mean of its divisors is an integer number (11127996).

Almost surely, 2^66668313 is an apocalyptic number.

It is an amenable number.

66668313 is a deficient number, since it is larger than the sum of its proper divisors (22355655).

66668313 is a wasteful number, since it uses less digits than its factorization.

66668313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33223.

The product of its digits is 93312, while the sum is 39.

The square root of 66668313 is about 8165.0666255702. The cubic root of 66668313 is about 405.4834707880.

The spelling of 66668313 in words is "sixty-six million, six hundred sixty-eight thousand, three hundred thirteen".