668112841 has 4 divisors (see below), whose sum is σ = 728850384. Its totient is φ = 607375300.

The previous prime is 668112787. The next prime is 668112847. The reversal of 668112841 is 148211866.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 668112841 - 2¹⁹ = 667588553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 668112841.

It is not an unprimeable number, because it can be changed into a prime (668112847) 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 3 ways as a sum of consecutive naturals, for example, 30368755 + ... + 30368776.

It is an arithmetic number, because the mean of its divisors is an integer number (182212596).

Almost surely, 2^668112841 is an apocalyptic number.

It is an amenable number.

668112841 is a deficient number, since it is larger than the sum of its proper divisors (60737543).

668112841 is a wasteful number, since it uses less digits than its factorization.

668112841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60737542.

The product of its digits is 18432, while the sum is 37.

The square root of 668112841 is about 25847.8788491435. The cubic root of 668112841 is about 874.2116833531.

The spelling of 668112841 in words is "six hundred sixty-eight million, one hundred twelve thousand, eight hundred forty-one".