6669806068 has 6 divisors (see below), whose sum is σ = 11672160626. Its totient is φ = 3334903032.

The previous prime is 6669806057. The next prime is 6669806069. The reversal of 6669806068 is 8606089666.

It can be written as a sum of positive squares in only one way, i.e., 4204484964 + 2465321104 = 64842^2 + 49652^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6669806069) 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 as a sum of consecutive naturals, namely, 833725755 + ... + 833725762.

Almost surely, 2^6669806068 is an apocalyptic number.

It is an amenable number.

6669806068 is a deficient number, since it is larger than the sum of its proper divisors (5002354558).

6669806068 is a wasteful number, since it uses less digits than its factorization.

6669806068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667451521 (or 1667451519 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 55.

The square root of 6669806068 is about 81668.8806584246. The cubic root of 6669806068 is about 1882.3674403771.

The spelling of 6669806068 in words is "six billion, six hundred sixty-nine million, eight hundred six thousand, sixty-eight".