668408041 has 8 divisors (see below), whose sum is σ = 764273664. Its totient is φ = 572637120.

The previous prime is 668408033. The next prime is 668408051. The reversal of 668408041 is 140804866.

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 668408041 - 2³ = 668408033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (668408021) 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, 7840 + ... + 37393.

It is an arithmetic number, because the mean of its divisors is an integer number (95534208).

Almost surely, 2^668408041 is an apocalyptic number.

It is an amenable number.

668408041 is a deficient number, since it is larger than the sum of its proper divisors (95865623).

668408041 is a wasteful number, since it uses less digits than its factorization.

668408041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47351.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 668408041 is about 25853.5885516885. The cubic root of 668408041 is about 874.3404187374.

The spelling of 668408041 in words is "six hundred sixty-eight million, four hundred eight thousand, forty-one".