668754217 has 8 divisors (see below), whose sum is σ = 674849600. Its totient is φ = 662682384.

The previous prime is 668754209. The next prime is 668754253. The reversal of 668754217 is 712457866.

It is a happy number.

668754217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 668754217 - 2³ = 668754209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668754287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53884 + ... + 65122.

It is an arithmetic number, because the mean of its divisors is an integer number (84356200).

Almost surely, 2^668754217 is an apocalyptic number.

It is an amenable number.

668754217 is a deficient number, since it is larger than the sum of its proper divisors (6095383).

668754217 is a wasteful number, since it uses less digits than its factorization.

668754217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11775.

The product of its digits is 564480, while the sum is 46.

The square root of 668754217 is about 25860.2826163985. The cubic root of 668754217 is about 874.4913362470.

The spelling of 668754217 in words is "six hundred sixty-eight million, seven hundred fifty-four thousand, two hundred seventeen".