664344670 has 32 divisors (see below), whose sum is σ = 1317469536. Its totient is φ = 239184000.

The previous prime is 664344643. The next prime is 664344677. The reversal of 664344670 is 76443466.

664344670 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664344677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18789 + ... + 41008.

It is an arithmetic number, because the mean of its divisors is an integer number (41170923).

Almost surely, 2^664344670 is an apocalyptic number.

664344670 is a deficient number, since it is larger than the sum of its proper divisors (653124866).

664344670 is a wasteful number, since it uses less digits than its factorization.

664344670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59916.

The product of its (nonzero) digits is 290304, while the sum is 40.

The square root of 664344670 is about 25774.8844808275. The cubic root of 664344670 is about 872.5650594748.

The spelling of 664344670 in words is "six hundred sixty-four million, three hundred forty-four thousand, six hundred seventy".