668917353 has 8 divisors (see below), whose sum is σ = 960496768. Its totient is φ = 411641424.

The previous prime is 668917351. The next prime is 668917357. The reversal of 668917353 is 353719866.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 668917353 - 2¹ = 668917351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668917351) 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, 8575825 + ... + 8575902.

It is an arithmetic number, because the mean of its divisors is an integer number (120062096).

Almost surely, 2^668917353 is an apocalyptic number.

It is an amenable number.

668917353 is a deficient number, since it is larger than the sum of its proper divisors (291579415).

668917353 is a wasteful number, since it uses less digits than its factorization.

668917353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17151743.

The product of its digits is 816480, while the sum is 48.

The square root of 668917353 is about 25863.4366045968. The cubic root of 668917353 is about 874.5624383132.

It can be divided in two parts, 6689 and 17353, that added together give a palindrome (24042).

The spelling of 668917353 in words is "six hundred sixty-eight million, nine hundred seventeen thousand, three hundred fifty-three".