668438058 has 32 divisors (see below), whose sum is σ = 1394265600. Its totient is φ = 213396480.

The previous prime is 668438021. The next prime is 668438059. The reversal of 668438058 is 850834866.

It is a super-3 number, since 3×668438058³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 668437998 and 668438016.

It is not an unprimeable number, because it can be changed into a prime (668438059) 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 15 ways as a sum of consecutive naturals, for example, 483 + ... + 36566.

It is an arithmetic number, because the mean of its divisors is an integer number (43570800).

Almost surely, 2^668438058 is an apocalyptic number.

668438058 is an abundant number, since it is smaller than the sum of its proper divisors (725827542).

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

668438058 is a wasteful number, since it uses less digits than its factorization.

668438058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37182.

The product of its (nonzero) digits is 1105920, while the sum is 48.

The square root of 668438058 is about 25854.1690641954. The cubic root of 668438058 is about 874.3535068921.

The spelling of 668438058 in words is "six hundred sixty-eight million, four hundred thirty-eight thousand, fifty-eight".