6663606317 has 2 divisors, whose sum is σ = 6663606318. Its totient is φ = 6663606316.

The previous prime is 6663606311. The next prime is 6663606343. The reversal of 6663606317 is 7136063666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4216424356 + 2447181961 = 64934^2 + 49469^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6663606317 is a prime.

It is a super-3 number, since 3×6663606317³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6663606311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3331803158 + 3331803159.

It is an arithmetic number, because the mean of its divisors is an integer number (3331803159).

Almost surely, 2^6663606317 is an apocalyptic number.

It is an amenable number.

6663606317 is a deficient number, since it is larger than the sum of its proper divisors (1).

6663606317 is an equidigital number, since it uses as much as digits as its factorization.

6663606317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 44.

The square root of 6663606317 is about 81630.9152037388. The cubic root of 6663606317 is about 1881.7840237536.

The spelling of 6663606317 in words is "six billion, six hundred sixty-three million, six hundred six thousand, three hundred seventeen".