1668327378 has 16 divisors (see below), whose sum is σ = 3337561920. Its totient is φ = 555957936.

The previous prime is 1668327377. The next prime is 1668327383. The reversal of 1668327378 is 8737238661.

1668327378 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1668327378.

It is not an unprimeable number, because it can be changed into a prime (1668327371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12598 + ... + 59121.

It is an arithmetic number, because the mean of its divisors is an integer number (208597620).

Almost surely, 2^1668327378 is an apocalyptic number.

1668327378 is an abundant number, since it is smaller than the sum of its proper divisors (1669234542).

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

1668327378 is a wasteful number, since it uses less digits than its factorization.

1668327378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75601.

The product of its digits is 2032128, while the sum is 51.

The square root of 1668327378 is about 40845.1634590927. The cubic root of 1668327378 is about 1186.0247689735.

The spelling of 1668327378 in words is "one billion, six hundred sixty-eight million, three hundred twenty-seven thousand, three hundred seventy-eight".