6665928295666 has 16 divisors (see below), whose sum is σ = 10135963157400. Its totient is φ = 3287274807168.

The previous prime is 6665928295627. The next prime is 6665928295679.

6665928295666 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 6660162171441 + 5766124225 = 2580729^2 + 75935^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6665928295592 and 6665928295601.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22645680 + ... + 22938148.

Almost surely, 2^{6665928295666} is an apocalyptic number.

6665928295666 is a deficient number, since it is larger than the sum of its proper divisors (3470034861734).

6665928295666 is a wasteful number, since it uses less digits than its factorization.

6665928295666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448653.

The product of its digits is 3023308800, while the sum is 76.

The spelling of 6665928295666 in words is "six trillion, six hundred sixty-five billion, nine hundred twenty-eight million, two hundred ninety-five thousand, six hundred sixty-six".