668284187406850 has 96 divisors (see below), whose sum is σ = 1447412416926336. Its totient is φ = 224798564390400.

The previous prime is 668284187406821. The next prime is 668284187406887. The reversal of 668284187406850 is 58604781482866.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1053823870 + ... + 1054457830.

It is an arithmetic number, because the mean of its divisors is an integer number (15077212676316).

Almost surely, 2^{668284187406850} is an apocalyptic number.

668284187406850 is an abundant number, since it is smaller than the sum of its proper divisors (779128229519486).

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

668284187406850 is a wasteful number, since it uses less digits than its factorization.

668284187406850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690860 (or 690855 counting only the distinct ones).

The product of its (nonzero) digits is 990904320, while the sum is 73.

The spelling of 668284187406850 in words is "six hundred sixty-eight trillion, two hundred eighty-four billion, one hundred eighty-seven million, four hundred six thousand, eight hundred fifty".