664760464 has 10 divisors (see below), whose sum is σ = 1287973430. Its totient is φ = 332380224.

The previous prime is 664760441. The next prime is 664760507. The reversal of 664760464 is 464067466.

664760464 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 361304064 + 303456400 = 19008^2 + 17420^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 664760464.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20773749 + ... + 20773780.

It is an arithmetic number, because the mean of its divisors is an integer number (128797343).

Almost surely, 2^664760464 is an apocalyptic number.

It is an amenable number.

664760464 is a deficient number, since it is larger than the sum of its proper divisors (623212966).

664760464 is a wasteful number, since it uses less digits than its factorization.

664760464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41547537 (or 41547531 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 43.

The square root of 664760464 is about 25782.9490943142. The cubic root of 664760464 is about 872.7470592052.

The spelling of 664760464 in words is "six hundred sixty-four million, seven hundred sixty thousand, four hundred sixty-four".