664560214 has 4 divisors (see below), whose sum is σ = 996840324. Its totient is φ = 332280106.

The previous prime is 664560199. The next prime is 664560263. The reversal of 664560214 is 412065466.

664560214 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 664560214.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166140052 + ... + 166140055.

It is an arithmetic number, because the mean of its divisors is an integer number (249210081).

Almost surely, 2^664560214 is an apocalyptic number.

664560214 is a deficient number, since it is larger than the sum of its proper divisors (332280110).

664560214 is a wasteful number, since it uses less digits than its factorization.

664560214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332280109.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 664560214 is about 25779.0654213841. The cubic root of 664560214 is about 872.6594160316.

The spelling of 664560214 in words is "six hundred sixty-four million, five hundred sixty thousand, two hundred fourteen".