668241844 has 12 divisors (see below), whose sum is σ = 1196619424. Its totient is φ = 326350584.

The previous prime is 668241779. The next prime is 668241863. The reversal of 668241844 is 448142866.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a self number, because there is not a number n which added to its sum of digits gives 668241844.

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, 1942392 + ... + 1942735.

Almost surely, 2^668241844 is an apocalyptic number.

It is an amenable number.

668241844 is a deficient number, since it is larger than the sum of its proper divisors (528377580).

668241844 is a wasteful number, since it uses less digits than its factorization.

668241844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3885174 (or 3885172 counting only the distinct ones).

The product of its digits is 294912, while the sum is 43.

The square root of 668241844 is about 25850.3741558996. The cubic root of 668241844 is about 874.2679456415.

The spelling of 668241844 in words is "six hundred sixty-eight million, two hundred forty-one thousand, eight hundred forty-four".