668133893 has 8 divisors (see below), whose sum is σ = 763831488. Its totient is φ = 572498784.

The previous prime is 668133863. The next prime is 668133899. The reversal of 668133893 is 398331866.

668133893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 668133893 - 2¹⁸ = 667871749 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668133899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10130 + ... + 37932.

It is an arithmetic number, because the mean of its divisors is an integer number (95478936).

Almost surely, 2^668133893 is an apocalyptic number.

It is an amenable number.

668133893 is a deficient number, since it is larger than the sum of its proper divisors (95697595).

668133893 is a wasteful number, since it uses less digits than its factorization.

668133893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31243.

The product of its digits is 559872, while the sum is 47.

The square root of 668133893 is about 25848.2860747091. The cubic root of 668133893 is about 874.2208652906.

The spelling of 668133893 in words is "six hundred sixty-eight million, one hundred thirty-three thousand, eight hundred ninety-three".