1668104 has 8 divisors (see below), whose sum is σ = 3127710. Its totient is φ = 834048.

The previous prime is 1668089. The next prime is 1668113. The reversal of 1668104 is 4018661.

It can be written as a sum of positive squares in only one way, i.e., 1416100 + 252004 = 1190^2 + 502^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104249 + ... + 104264.

2^1668104 is an apocalyptic number.

It is an amenable number.

1668104 is a deficient number, since it is larger than the sum of its proper divisors (1459606).

1668104 is a wasteful number, since it uses less digits than its factorization.

1668104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208519 (or 208515 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1668104 is about 1291.5510055743. The cubic root of 1668104 is about 118.5971832987.

The spelling of 1668104 in words is "one million, six hundred sixty-eight thousand, one hundred four".