668886294 has 8 divisors (see below), whose sum is σ = 1337772600. Its totient is φ = 222962096.

The previous prime is 668886271. The next prime is 668886307. The reversal of 668886294 is 492688866.

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

668886294 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 55740519 + ... + 55740530.

It is an arithmetic number, because the mean of its divisors is an integer number (167221575).

Almost surely, 2^668886294 is an apocalyptic number.

668886294 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668886294 is a wasteful number, since it uses less digits than its factorization.

668886294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111481054.

The product of its digits is 7962624, while the sum is 57.

The square root of 668886294 is about 25862.8361553794. The cubic root of 668886294 is about 874.5489022837.

The spelling of 668886294 in words is "six hundred sixty-eight million, eight hundred eighty-six thousand, two hundred ninety-four".