668107444 has 24 divisors (see below), whose sum is σ = 1210906368. Its totient is φ = 322334880.

The previous prime is 668107403. The next prime is 668107457. The reversal of 668107444 is 444701866.

It is a junction number, because it is equal to n+sod(n) for n = 668107397 and 668107406.

It is a congruent number.

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, 11679 + ... + 38374.

It is an arithmetic number, because the mean of its divisors is an integer number (50454432).

Almost surely, 2^668107444 is an apocalyptic number.

It is an amenable number.

668107444 is a deficient number, since it is larger than the sum of its proper divisors (542798924).

668107444 is a wasteful number, since it uses less digits than its factorization.

668107444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50175 (or 50173 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 668107444 is about 25847.7744496504. The cubic root of 668107444 is about 874.2093293929.

The spelling of 668107444 in words is "six hundred sixty-eight million, one hundred seven thousand, four hundred forty-four".