668663000366866 has 16 divisors (see below), whose sum is σ = 1003491636549120. Its totient is φ = 334165818954240.

The previous prime is 668663000366833. The next prime is 668663000366869.

668663000366866 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×668663000366866² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 668663000366795 and 668663000366804.

It is not an unprimeable number, because it can be changed into a prime (668663000366869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35804671 + ... + 51179101.

It is an arithmetic number, because the mean of its divisors is an integer number (62718227284320).

Almost surely, 2^{668663000366866} is an apocalyptic number.

668663000366866 is a deficient number, since it is larger than the sum of its proper divisors (334828636182254).

668663000366866 is a wasteful number, since it uses less digits than its factorization.

668663000366866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15385209.

The product of its (nonzero) digits is 967458816, while the sum is 70.

The spelling of 668663000366866 in words is "six hundred sixty-eight trillion, six hundred sixty-three billion, three hundred sixty-six thousand, eight hundred sixty-six".