6660318247 has 4 divisors (see below), whose sum is σ = 7265801736. Its totient is φ = 6054834760.

The previous prime is 6660318241. The next prime is 6660318251. The reversal of 6660318247 is 7428130666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6660318247 - 2³ = 6660318239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660318241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302741728 + ... + 302741749.

It is an arithmetic number, because the mean of its divisors is an integer number (1816450434).

Almost surely, 2^6660318247 is an apocalyptic number.

6660318247 is a deficient number, since it is larger than the sum of its proper divisors (605483489).

6660318247 is a wasteful number, since it uses less digits than its factorization.

6660318247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605483488.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 6660318247 is about 81610.7728611854. The cubic root of 6660318247 is about 1881.4744588682.

The spelling of 6660318247 in words is "six billion, six hundred sixty million, three hundred eighteen thousand, two hundred forty-seven".