668898063 has 12 divisors (see below), whose sum is σ = 970767928. Its totient is φ = 443817360.

The previous prime is 668898037. The next prime is 668898071. The reversal of 668898063 is 360898866.

It is not a de Polignac number, because 668898063 - 2¹⁰ = 668897039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668898073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 174220 + ... + 178017.

Almost surely, 2^668898063 is an apocalyptic number.

668898063 is a deficient number, since it is larger than the sum of its proper divisors (301869865).

668898063 is a wasteful number, since it uses less digits than its factorization.

668898063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352454 (or 352451 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The square root of 668898063 is about 25863.0636816291. The cubic root of 668898063 is about 874.5540314592.

The spelling of 668898063 in words is "six hundred sixty-eight million, eight hundred ninety-eight thousand, sixty-three".