6660108947 has 2 divisors, whose sum is σ = 6660108948. Its totient is φ = 6660108946.

The previous prime is 6660108943. The next prime is 6660109019. The reversal of 6660108947 is 7498010666.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6660108947 - 2² = 6660108943 is a prime.

It is not a weakly prime, because it can be changed into another prime (6660108943) 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 as a sum of consecutive naturals, namely, 3330054473 + 3330054474.

It is an arithmetic number, because the mean of its divisors is an integer number (3330054474).

Almost surely, 2^6660108947 is an apocalyptic number.

6660108947 is a deficient number, since it is larger than the sum of its proper divisors (1).

6660108947 is an equidigital number, since it uses as much as digits as its factorization.

6660108947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 6660108947 is about 81609.4905449115. The cubic root of 6660108947 is about 1881.4547502640.

The spelling of 6660108947 in words is "six billion, six hundred sixty million, one hundred eight thousand, nine hundred forty-seven".