6664959187 has 2 divisors, whose sum is σ = 6664959188. Its totient is φ = 6664959186.

The previous prime is 6664959151. The next prime is 6664959229. The reversal of 6664959187 is 7819594666.

6664959187 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6664959187 - 2³¹ = 4517475539 is a prime.

It is not a weakly prime, because it can be changed into another prime (6664953187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332479593 + 3332479594.

It is an arithmetic number, because the mean of its divisors is an integer number (3332479594).

Almost surely, 2^6664959187 is an apocalyptic number.

6664959187 is a deficient number, since it is larger than the sum of its proper divisors (1).

6664959187 is an equidigital number, since it uses as much as digits as its factorization.

6664959187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19595520, while the sum is 61.

The square root of 6664959187 is about 81639.2012883517. The cubic root of 6664959187 is about 1881.9113640537.

The spelling of 6664959187 in words is "six billion, six hundred sixty-four million, nine hundred fifty-nine thousand, one hundred eighty-seven".