6668504686 has 4 divisors (see below), whose sum is σ = 10002757032. Its totient is φ = 3334252342.

The previous prime is 6668504681. The next prime is 6668504749. The reversal of 6668504686 is 6864058666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668504681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1667126170 + ... + 1667126173.

It is an arithmetic number, because the mean of its divisors is an integer number (2500689258).

Almost surely, 2^6668504686 is an apocalyptic number.

6668504686 is a deficient number, since it is larger than the sum of its proper divisors (3334252346).

6668504686 is a wasteful number, since it uses less digits than its factorization.

6668504686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3334252345.

The product of its (nonzero) digits is 9953280, while the sum is 55.

The square root of 6668504686 is about 81660.9128408445. The cubic root of 6668504686 is about 1882.2450061104.

The spelling of 6668504686 in words is "six billion, six hundred sixty-eight million, five hundred four thousand, six hundred eighty-six".