668433193 has 4 divisors (see below), whose sum is σ = 669246208. Its totient is φ = 667620180.

The previous prime is 668433163. The next prime is 668433197. The reversal of 668433193 is 391334866.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 668433193 - 2¹⁷ = 668302121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668433197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405273 + ... + 406918.

It is an arithmetic number, because the mean of its divisors is an integer number (167311552).

Almost surely, 2^668433193 is an apocalyptic number.

It is an amenable number.

668433193 is a deficient number, since it is larger than the sum of its proper divisors (813015).

668433193 is an equidigital number, since it uses as much as digits as its factorization.

668433193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813014.

The product of its digits is 279936, while the sum is 43.

The square root of 668433193 is about 25854.0749786180. The cubic root of 668433193 is about 874.3513856583.

The spelling of 668433193 in words is "six hundred sixty-eight million, four hundred thirty-three thousand, one hundred ninety-three".