6668866674 has 32 divisors (see below), whose sum is σ = 15022722240. Its totient is φ = 2192502816.

The previous prime is 6668866621. The next prime is 6668866679. The reversal of 6668866674 is 4766688666.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6668866679) 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 in 15 ways as a sum of consecutive naturals, for example, 841932 + ... + 849815.

It is an arithmetic number, because the mean of its divisors is an integer number (469460070).

Almost surely, 2^6668866674 is an apocalyptic number.

6668866674 is an abundant number, since it is smaller than the sum of its proper divisors (8353855566).

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

6668866674 is a wasteful number, since it uses less digits than its factorization.

6668866674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691831 (or 1691825 counting only the distinct ones).

The product of its digits is 83607552, while the sum is 63.

The square root of 6668866674 is about 81663.1292199852. The cubic root of 6668866674 is about 1882.2790636095.

The spelling of 6668866674 in words is "six billion, six hundred sixty-eight million, eight hundred sixty-six thousand, six hundred seventy-four".