668836293 has 8 divisors (see below), whose sum is σ = 903998208. Its totient is φ = 439782624.

The previous prime is 668836279. The next prime is 668836307. The reversal of 668836293 is 392638866.

It is an interprime number because it is at equal distance from previous prime (668836279) and next prime (668836307).

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

It is not a de Polignac number, because 668836293 - 2⁵ = 668836261 is a prime.

It is a super-3 number, since 3×668836293³ (a number of 27 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668836093) 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, 1526805 + ... + 1527242.

It is an arithmetic number, because the mean of its divisors is an integer number (112999776).

Almost surely, 2^668836293 is an apocalyptic number.

It is an amenable number.

668836293 is a deficient number, since it is larger than the sum of its proper divisors (235161915).

668836293 is a wasteful number, since it uses less digits than its factorization.

668836293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3054123.

The product of its digits is 2239488, while the sum is 51.

The square root of 668836293 is about 25861.8694799893. The cubic root of 668836293 is about 874.5271101347.

The spelling of 668836293 in words is "six hundred sixty-eight million, eight hundred thirty-six thousand, two hundred ninety-three".