1668672193 has 8 divisors (see below), whose sum is σ = 1712573928. Its totient is φ = 1625230464.

The previous prime is 1668672167. The next prime is 1668672199. The reversal of 1668672193 is 3912768661.

It can be written as a sum of positive squares in 4 ways, for example, as 825815169 + 842857024 = 28737^2 + 29032^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1668672193 - 2²¹ = 1666575041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668672199) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 107646 + ... + 122167.

It is an arithmetic number, because the mean of its divisors is an integer number (214071741).

Almost surely, 2^1668672193 is an apocalyptic number.

It is an amenable number.

1668672193 is a deficient number, since it is larger than the sum of its proper divisors (43901735).

1668672193 is a wasteful number, since it uses less digits than its factorization.

1668672193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230003.

The product of its digits is 653184, while the sum is 49.

The square root of 1668672193 is about 40849.3842426052. The cubic root of 1668672193 is about 1186.1064737525.

The spelling of 1668672193 in words is "one billion, six hundred sixty-eight million, six hundred seventy-two thousand, one hundred ninety-three".