168040681926666 has 8 divisors (see below), whose sum is σ = 336081363853344. Its totient is φ = 56013560642220.

The previous prime is 168040681926659. The next prime is 168040681926731. The reversal of 168040681926666 is 666629186040861.

It is a sphenic number, since it is the product of 3 distinct primes.

168040681926666 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 168040681926666.

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 3 ways as a sum of consecutive naturals, for example, 14003390160550 + ... + 14003390160561.

It is an arithmetic number, because the mean of its divisors is an integer number (42010170481668).

Almost surely, 2^{168040681926666} is an apocalyptic number.

168040681926666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

168040681926666 is a wasteful number, since it uses less digits than its factorization.

168040681926666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28006780321116.

The product of its (nonzero) digits is 214990848, while the sum is 69.

The spelling of 168040681926666 in words is "one hundred sixty-eight trillion, forty billion, six hundred eighty-one million, nine hundred twenty-six thousand, six hundred sixty-six".