668004646 has 8 divisors (see below), whose sum is σ = 1011735504. Its totient is φ = 330759480.

The previous prime is 668004629. The next prime is 668004661. The reversal of 668004646 is 646400866.

668004646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 668004599 and 668004608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1621165 + ... + 1621576.

It is an arithmetic number, because the mean of its divisors is an integer number (126466938).

Almost surely, 2^668004646 is an apocalyptic number.

668004646 is a deficient number, since it is larger than the sum of its proper divisors (343730858).

668004646 is a wasteful number, since it uses less digits than its factorization.

668004646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3242846.

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 668004646 is about 25845.7858460524. The cubic root of 668004646 is about 874.1644905071.

The spelling of 668004646 in words is "six hundred sixty-eight million, four thousand, six hundred forty-six".