6666598487 has 16 divisors (see below), whose sum is σ = 6862233600. Its totient is φ = 6473403360.

The previous prime is 6666598447. The next prime is 6666598559. The reversal of 6666598487 is 7848956666.

It is a cyclic number.

It is not a de Polignac number, because 6666598487 - 2²⁴ = 6649821271 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 (6666598447) 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 15 ways as a sum of consecutive naturals, for example, 4568564 + ... + 4570022.

It is an arithmetic number, because the mean of its divisors is an integer number (428889600).

Almost surely, 2^6666598487 is an apocalyptic number.

6666598487 is a deficient number, since it is larger than the sum of its proper divisors (195635113).

6666598487 is a wasteful number, since it uses less digits than its factorization.

6666598487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2206.

The product of its digits is 104509440, while the sum is 65.

The square root of 6666598487 is about 81649.2405782197. The cubic root of 6666598487 is about 1882.0656417879.

The spelling of 6666598487 in words is "six billion, six hundred sixty-six million, five hundred ninety-eight thousand, four hundred eighty-seven".