667418167888 has 20 divisors (see below), whose sum is σ = 1293763874740. Its totient is φ = 333543619584.

The previous prime is 667418167861. The next prime is 667418167903. The reversal of 667418167888 is 888761814766.

It can be written as a sum of positive squares in 2 ways, for example, as 281145973824 + 386272194064 = 530232^2 + 621508^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10308243 + ... + 10372786.

It is an arithmetic number, because the mean of its divisors is an integer number (64688193737).

Almost surely, 2^667418167888 is an apocalyptic number.

It is an amenable number.

667418167888 is a deficient number, since it is larger than the sum of its proper divisors (626345706852).

667418167888 is a wasteful number, since it uses less digits than its factorization.

667418167888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20683054 (or 20683048 counting only the distinct ones).

The product of its digits is 173408256, while the sum is 70.

The spelling of 667418167888 in words is "six hundred sixty-seven billion, four hundred eighteen million, one hundred sixty-seven thousand, eight hundred eighty-eight".