1668676 has 6 divisors (see below), whose sum is σ = 2920190. Its totient is φ = 834336.

The previous prime is 1668649. The next prime is 1668679. The reversal of 1668676 is 6768661.

It can be written as a sum of positive squares in only one way, i.e., 1638400 + 30276 = 1280^2 + 174^2 .

It is not an unprimeable number, because it can be changed into a prime (1668679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208581 + ... + 208588.

2^1668676 is an apocalyptic number.

It is an amenable number.

1668676 is a deficient number, since it is larger than the sum of its proper divisors (1251514).

1668676 is a wasteful number, since it uses less digits than its factorization.

1668676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417173 (or 417171 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 1668676 is about 1291.7724257779. The cubic root of 1668676 is about 118.6107375768.

The spelling of 1668676 in words is "one million, six hundred sixty-eight thousand, six hundred seventy-six".