668990314 has 4 divisors (see below), whose sum is σ = 1003485474. Its totient is φ = 334495156.

The previous prime is 668990291. The next prime is 668990347. The reversal of 668990314 is 413099866.

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., 504766089 + 164224225 = 22467^2 + 12815^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167247577 + ... + 167247580.

Almost surely, 2^668990314 is an apocalyptic number.

668990314 is a deficient number, since it is larger than the sum of its proper divisors (334495160).

668990314 is a wasteful number, since it uses less digits than its factorization.

668990314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334495159.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 668990314 is about 25864.8470708798. The cubic root of 668990314 is about 874.5942342842.

The spelling of 668990314 in words is "six hundred sixty-eight million, nine hundred ninety thousand, three hundred fourteen".