668476674866 has 32 divisors (see below), whose sum is σ = 1346302677888. Its totient is φ = 240411191040.

The previous prime is 668476674851. The next prime is 668476674871.

668476674866 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×668476674866² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 668476674793 and 668476674802.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 166950215 + ... + 166954218.

It is an arithmetic number, because the mean of its divisors is an integer number (42071958684).

Almost surely, 2^668476674866 is an apocalyptic number.

668476674866 is an abundant number, since it is smaller than the sum of its proper divisors (677826003022).

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

668476674866 is a wasteful number, since it uses less digits than its factorization.

668476674866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333904466.

The product of its digits is 2341011456, while the sum is 74.

The spelling of 668476674866 in words is "six hundred sixty-eight billion, four hundred seventy-six million, six hundred seventy-four thousand, eight hundred sixty-six".