664544614 has 8 divisors (see below), whose sum is σ = 1013158368. Its totient is φ = 326825160.

The previous prime is 664544597. The next prime is 664544651. The reversal of 664544614 is 416445466.

664544614 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 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, 2723422 + ... + 2723665.

It is an arithmetic number, because the mean of its divisors is an integer number (126644796).

Almost surely, 2^664544614 is an apocalyptic number.

664544614 is a deficient number, since it is larger than the sum of its proper divisors (348613754).

664544614 is a wasteful number, since it uses less digits than its factorization.

664544614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5447150.

The product of its digits is 276480, while the sum is 40.

The square root of 664544614 is about 25778.7628485154. The cubic root of 664544614 is about 872.6525876594.

The spelling of 664544614 in words is "six hundred sixty-four million, five hundred forty-four thousand, six hundred fourteen".