1668475316 has 6 divisors (see below), whose sum is σ = 2919831810. Its totient is φ = 834237656.

The previous prime is 1668475283. The next prime is 1668475349. The reversal of 1668475316 is 6135748661.

It is an interprime number because it is at equal distance from previous prime (1668475283) and next prime (1668475349).

It can be written as a sum of positive squares in only one way, i.e., 1210344100 + 458131216 = 34790^2 + 21404^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208559411 + ... + 208559418.

It is an arithmetic number, because the mean of its divisors is an integer number (486638635).

Almost surely, 2^1668475316 is an apocalyptic number.

It is an amenable number.

1668475316 is a deficient number, since it is larger than the sum of its proper divisors (1251356494).

1668475316 is a wasteful number, since it uses less digits than its factorization.

1668475316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417118833 (or 417118831 counting only the distinct ones).

The product of its digits is 725760, while the sum is 47.

The square root of 1668475316 is about 40846.9743799954. The cubic root of 1668475316 is about 1186.0598246324.

The spelling of 1668475316 in words is "one billion, six hundred sixty-eight million, four hundred seventy-five thousand, three hundred sixteen".