668873354 has 4 divisors (see below), whose sum is σ = 1003310034. Its totient is φ = 334436676.

The previous prime is 668873351. The next prime is 668873389. The reversal of 668873354 is 453378866.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 637815025 + 31058329 = 25255^2 + 5573^2 .

It is not an unprimeable number, because it can be changed into a prime (668873351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167218337 + ... + 167218340.

Almost surely, 2^668873354 is an apocalyptic number.

668873354 is a deficient number, since it is larger than the sum of its proper divisors (334436680).

668873354 is a wasteful number, since it uses less digits than its factorization.

668873354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334436679.

The product of its digits is 2903040, while the sum is 50.

The square root of 668873354 is about 25862.5859882572. The cubic root of 668873354 is about 874.5432626925.

The spelling of 668873354 in words is "six hundred sixty-eight million, eight hundred seventy-three thousand, three hundred fifty-four".