1668078 has 12 divisors (see below), whose sum is σ = 3614208. Its totient is φ = 556020.

The previous prime is 1668061. The next prime is 1668083. The reversal of 1668078 is 8708661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46318 + ... + 46353.

It is an arithmetic number, because the mean of its divisors is an integer number (301184).

2^1668078 is an apocalyptic number.

1668078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1668078 is an abundant number, since it is smaller than the sum of its proper divisors (1946130).

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

1668078 is a wasteful number, since it uses less digits than its factorization.

1668078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92679 (or 92676 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1668078 is about 1291.5409401177. The cubic root of 1668078 is about 118.5965671215.

The spelling of 1668078 in words is "one million, six hundred sixty-eight thousand, seventy-eight".