668933846946 has 48 divisors (see below), whose sum is σ = 1512449115840. Its totient is φ = 213272405280.

The previous prime is 668933846891. The next prime is 668933846947. The reversal of 668933846946 is 649648339866.

668933846946 is a `hidden beast` number, since 6 + 6 + 8 + 93 + 38 + 469 + 46 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (668933846947) 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 23 ways as a sum of consecutive naturals, for example, 13443000 + ... + 13492668.

It is an arithmetic number, because the mean of its divisors is an integer number (31509356580).

Almost surely, 2^668933846946 is an apocalyptic number.

668933846946 is an abundant number, since it is smaller than the sum of its proper divisors (843515268894).

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

668933846946 is a wasteful number, since it uses less digits than its factorization.

668933846946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82231 (or 82228 counting only the distinct ones).

The product of its digits is 967458816, while the sum is 72.

The spelling of 668933846946 in words is "six hundred sixty-eight billion, nine hundred thirty-three million, eight hundred forty-six thousand, nine hundred forty-six".