666366313 has 8 divisors (see below), whose sum is σ = 682691328. Its totient is φ = 650079024.

The previous prime is 666366301. The next prime is 666366319. The reversal of 666366313 is 313663666.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666366313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666366319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28131 + ... + 46087.

It is an arithmetic number, because the mean of its divisors is an integer number (85336416).

Almost surely, 2^666366313 is an apocalyptic number.

It is an amenable number.

666366313 is a deficient number, since it is larger than the sum of its proper divisors (16325015).

666366313 is a wasteful number, since it uses less digits than its factorization.

666366313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18863.

The product of its digits is 209952, while the sum is 40.

The square root of 666366313 is about 25814.0719957158. The cubic root of 666366313 is about 873.4492534816.

The spelling of 666366313 in words is "six hundred sixty-six million, three hundred sixty-six thousand, three hundred thirteen".