6487869666 has 16 divisors (see below), whose sum is σ = 13158497088. Its totient is φ = 2132163600.

The previous prime is 6487869649. The next prime is 6487869679. The reversal of 6487869666 is 6669687846.

It is a junction number, because it is equal to n+sod(n) for n = 6487869597 and 6487869606.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7614445 + ... + 7615296.

It is an arithmetic number, because the mean of its divisors is an integer number (822406068).

Almost surely, 2^6487869666 is an apocalyptic number.

6487869666 is an abundant number, since it is smaller than the sum of its proper divisors (6670627422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6487869666 is a wasteful number, since it uses less digits than its factorization.

6487869666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15229817.

The product of its digits is 125411328, while the sum is 66.

The square root of 6487869666 is about 80547.3132140359. The cubic root of 6487869666 is about 1865.0939168349.

The spelling of 6487869666 in words is "six billion, four hundred eighty-seven million, eight hundred sixty-nine thousand, six hundred sixty-six".