664650760 has 32 divisors (see below), whose sum is σ = 1509992640. Its totient is φ = 263277504.

The previous prime is 664650743. The next prime is 664650769. The reversal of 664650760 is 67056466.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (664650769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76542 + ... + 84781.

It is an arithmetic number, because the mean of its divisors is an integer number (47187270).

Almost surely, 2^664650760 is an apocalyptic number.

It is an amenable number.

664650760 is an abundant number, since it is smaller than the sum of its proper divisors (845341880).

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

664650760 is a wasteful number, since it uses less digits than its factorization.

664650760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161437 (or 161433 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 664650760 is about 25780.8215540157. The cubic root of 664650760 is about 872.6990473695.

The spelling of 664650760 in words is "six hundred sixty-four million, six hundred fifty thousand, seven hundred sixty".