668266246648 has 64 divisors (see below), whose sum is σ = 1682348613120. Its totient is φ = 240335510400.

The previous prime is 668266246643. The next prime is 668266246649. The reversal of 668266246648 is 846642662866.

It is a self number, because there is not a number n which added to its sum of digits gives 668266246648.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668266246643) 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 15 ways as a sum of consecutive naturals, for example, 41716908 + ... + 41732923.

It is an arithmetic number, because the mean of its divisors is an integer number (26286697080).

Almost surely, 2^668266246648 is an apocalyptic number.

It is an amenable number.

668266246648 is an abundant number, since it is smaller than the sum of its proper divisors (1014082366472).

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

668266246648 is a wasteful number, since it uses less digits than its factorization.

668266246648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83449868 (or 83449864 counting only the distinct ones).

The product of its digits is 191102976, while the sum is 64.

The spelling of 668266246648 in words is "six hundred sixty-eight billion, two hundred sixty-six million, two hundred forty-six thousand, six hundred forty-eight".