664644096 has 80 divisors (see below), whose sum is σ = 1967433600. Its totient is φ = 221543424.

The previous prime is 664644091. The next prime is 664644139. The reversal of 664644096 is 690446466.

664644096 is a `hidden beast` number, since 66 + 464 + 40 + 96 = 666.

It is not an unprimeable number, because it can be changed into a prime (664644091) 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, 10216 + ... + 37863.

It is an arithmetic number, because the mean of its divisors is an integer number (24592920).

Almost surely, 2^664644096 is an apocalyptic number.

It is an amenable number.

664644096 is an abundant number, since it is smaller than the sum of its proper divisors (1302789504).

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

664644096 is an equidigital number, since it uses as much as digits as its factorization.

664644096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48106 (or 48084 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

The square root of 664644096 is about 25780.6923103318. The cubic root of 664644096 is about 872.6961307069.

The spelling of 664644096 in words is "six hundred sixty-four million, six hundred forty-four thousand, ninety-six".