1668466676 has 6 divisors (see below), whose sum is σ = 2919816690. Its totient is φ = 834233336.

The previous prime is 1668466663. The next prime is 1668466699. The reversal of 1668466676 is 6766648661.

It can be written as a sum of positive squares in only one way, i.e., 1658607076 + 9859600 = 40726^2 + 3140^2 .

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, 208558331 + ... + 208558338.

It is an arithmetic number, because the mean of its divisors is an integer number (486636115).

Almost surely, 2^1668466676 is an apocalyptic number.

It is an amenable number.

1668466676 is a deficient number, since it is larger than the sum of its proper divisors (1251350014).

1668466676 is a wasteful number, since it uses less digits than its factorization.

1668466676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417116673 (or 417116671 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 56.

The square root of 1668466676 is about 40846.8686192712. The cubic root of 1668466676 is about 1186.0577773391.

The spelling of 1668466676 in words is "one billion, six hundred sixty-eight million, four hundred sixty-six thousand, six hundred seventy-six".