1668112301978 has 8 divisors (see below), whose sum is σ = 2512907374068. Its totient is φ = 830476510624.

The previous prime is 1668112301963. The next prime is 1668112301981. The reversal of 1668112301978 is 8791032118661.

It can be written as a sum of positive squares in 2 ways, for example, as 1667024423689 + 1087878289 = 1291133^2 + 32983^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 1789819601 + ... + 1789820532.

Almost surely, 2^{1668112301978} is an apocalyptic number.

1668112301978 is a deficient number, since it is larger than the sum of its proper divisors (844795072090).

1668112301978 is a wasteful number, since it uses less digits than its factorization.

1668112301978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3579640368.

The product of its (nonzero) digits is 870912, while the sum is 53.

The spelling of 1668112301978 in words is "one trillion, six hundred sixty-eight billion, one hundred twelve million, three hundred one thousand, nine hundred seventy-eight".