668836343 has 8 divisors (see below), whose sum is σ = 797618688. Its totient is φ = 548362584.

The previous prime is 668836339. The next prime is 668836361. The reversal of 668836343 is 343638866.

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

It is not a de Polignac number, because 668836343 - 2² = 668836339 is a prime.

It is a super-2 number, since 2×668836343² = 894684107435227298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668836313) 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, 2076971 + ... + 2077292.

It is an arithmetic number, because the mean of its divisors is an integer number (99702336).

Almost surely, 2^668836343 is an apocalyptic number.

668836343 is a deficient number, since it is larger than the sum of its proper divisors (128782345).

668836343 is a wasteful number, since it uses less digits than its factorization.

668836343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4154293.

The product of its digits is 1492992, while the sum is 47.

The square root of 668836343 is about 25861.8704466634. The cubic root of 668836343 is about 874.5271319269.

The spelling of 668836343 in words is "six hundred sixty-eight million, eight hundred thirty-six thousand, three hundred forty-three".