668828246 has 32 divisors (see below), whose sum is σ = 1078751520. Its totient is φ = 309897216.

The previous prime is 668828239. The next prime is 668828257. The reversal of 668828246 is 642828866.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 668828194 and 668828203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 646946 + ... + 647978.

It is an arithmetic number, because the mean of its divisors is an integer number (33710985).

Almost surely, 2^668828246 is an apocalyptic number.

668828246 is a deficient number, since it is larger than the sum of its proper divisors (409923274).

668828246 is a wasteful number, since it uses less digits than its factorization.

668828246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328.

The product of its digits is 1769472, while the sum is 50.

The square root of 668828246 is about 25861.7139029879. The cubic root of 668828246 is about 874.5236028749.

The spelling of 668828246 in words is "six hundred sixty-eight million, eight hundred twenty-eight thousand, two hundred forty-six".