668019841 has 8 divisors (see below), whose sum is σ = 703922400. Its totient is φ = 632191680.

The previous prime is 668019839. The next prime is 668019893. The reversal of 668019841 is 148910866.

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 668019841 - 2¹ = 668019839 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668049841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345 + ... + 36553.

It is an arithmetic number, because the mean of its divisors is an integer number (87990300).

Almost surely, 2^668019841 is an apocalyptic number.

It is an amenable number.

668019841 is a deficient number, since it is larger than the sum of its proper divisors (35902559).

668019841 is a wasteful number, since it uses less digits than its factorization.

668019841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37199.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 668019841 is about 25846.0797994590. The cubic root of 668019841 is about 874.1711186190.

The spelling of 668019841 in words is "six hundred sixty-eight million, nineteen thousand, eight hundred forty-one".