664743200 has 72 divisors (see below), whose sum is σ = 1770355440. Its totient is φ = 241721600.

The previous prime is 664743193. The next prime is 664743203. The reversal of 664743200 is 2347466.

664743200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (664743203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28970 + ... + 46569.

It is an arithmetic number, because the mean of its divisors is an integer number (24588270).

Almost surely, 2^664743200 is an apocalyptic number.

It is an amenable number.

664743200 is an abundant number, since it is smaller than the sum of its proper divisors (1105612240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664743200 is a wasteful number, since it uses less digits than its factorization.

664743200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75570 (or 75557 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 664743200 is about 25782.6142972353. The cubic root of 664743200 is about 872.7395039847.

The spelling of 664743200 in words is "six hundred sixty-four million, seven hundred forty-three thousand, two hundred".