668897358 has 16 divisors (see below), whose sum is σ = 1339209936. Its totient is φ = 222729920.

The previous prime is 668897303. The next prime is 668897363. The reversal of 668897358 is 853798866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52773 + ... + 64208.

It is an arithmetic number, because the mean of its divisors is an integer number (83700621).

Almost surely, 2^668897358 is an apocalyptic number.

668897358 is an abundant number, since it is smaller than the sum of its proper divisors (670312578).

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

668897358 is a wasteful number, since it uses less digits than its factorization.

668897358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117939.

The product of its digits is 17418240, while the sum is 60.

The square root of 668897358 is about 25863.0500521497. The cubic root of 668897358 is about 874.5537242072.

It can be divided in two parts, 66889 and 7358, that added together give a palindrome (74247).

The spelling of 668897358 in words is "six hundred sixty-eight million, eight hundred ninety-seven thousand, three hundred fifty-eight".