668484866 has 32 divisors (see below), whose sum is σ = 1229074560. Its totient is φ = 266288256.

The previous prime is 668484827. The next prime is 668484881.

It is a happy number.

668484866 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9611 + ... + 37806.

It is an arithmetic number, because the mean of its divisors is an integer number (38408580).

Almost surely, 2^668484866 is an apocalyptic number.

668484866 is a deficient number, since it is larger than the sum of its proper divisors (560589694).

668484866 is a wasteful number, since it uses less digits than its factorization.

668484866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47498.

The product of its digits is 10616832, while the sum is 56.

The square root of 668484866 is about 25855.0742795297. The cubic root of 668484866 is about 874.3739155563.

The spelling of 668484866 in words is "six hundred sixty-eight million, four hundred eighty-four thousand, eight hundred sixty-six".