668051370884 has 24 divisors (see below), whose sum is σ = 1176606066048. Its totient is φ = 331879407840.

The previous prime is 668051370881. The next prime is 668051370929. The reversal of 668051370884 is 488073150866.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (668051370881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2108549 + ... + 2404595.

It is an arithmetic number, because the mean of its divisors is an integer number (49025252752).

Almost surely, 2^668051370884 is an apocalyptic number.

It is an amenable number.

668051370884 is a deficient number, since it is larger than the sum of its proper divisors (508554695164).

668051370884 is a wasteful number, since it uses less digits than its factorization.

668051370884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299675 (or 299673 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 56.

The spelling of 668051370884 in words is "six hundred sixty-eight billion, fifty-one million, three hundred seventy thousand, eight hundred eighty-four".