668000074128 has 40 divisors (see below), whose sum is σ = 1781333534976. Its totient is φ = 215483894400.

The previous prime is 668000074111. The next prime is 668000074171. The reversal of 668000074128 is 821470000866.

It is a self number, because there is not a number n which added to its sum of digits gives 668000074128.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224460903 + ... + 224463878.

Almost surely, 2^668000074128 is an apocalyptic number.

It is an amenable number.

668000074128 is an abundant number, since it is smaller than the sum of its proper divisors (1113333460848).

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

668000074128 is a wasteful number, since it uses less digits than its factorization.

668000074128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448924823 (or 448924817 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The spelling of 668000074128 in words is "six hundred sixty-eight billion, seventy-four thousand, one hundred twenty-eight".