668846698 has 16 divisors (see below), whose sum is σ = 1083103560. Its totient is φ = 307938816.

The previous prime is 668846641. The next prime is 668846701. The reversal of 668846698 is 896648866.

It can be written as a sum of positive squares in 4 ways, for example, as 624850009 + 43996689 = 24997^2 + 6633^2 .

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, 20815 + ... + 42082.

Almost surely, 2^668846698 is an apocalyptic number.

668846698 is a deficient number, since it is larger than the sum of its proper divisors (414256862).

668846698 is a wasteful number, since it uses less digits than its factorization.

668846698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63321.

The product of its digits is 23887872, while the sum is 61.

The square root of 668846698 is about 25862.0706440919. The cubic root of 668846698 is about 874.5316450797.

The spelling of 668846698 in words is "six hundred sixty-eight million, eight hundred forty-six thousand, six hundred ninety-eight".