664288340787232 has 48 divisors (see below), whose sum is σ = 1494653554900800. Its totient is φ = 284694091170048.

The previous prime is 664288340787229. The next prime is 664288340787233. The reversal of 664288340787232 is 232787043882466.

It is not an unprimeable number, because it can be changed into a prime (664288340787233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67796823 + ... + 76973929.

It is an arithmetic number, because the mean of its divisors is an integer number (31138615727100).

Almost surely, 2^{664288340787232} is an apocalyptic number.

It is an amenable number.

664288340787232 is an abundant number, since it is smaller than the sum of its proper divisors (830365214113568).

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

664288340787232 is a wasteful number, since it uses less digits than its factorization.

664288340787232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9500273 (or 9500265 counting only the distinct ones).

The product of its (nonzero) digits is 1040449536, while the sum is 70.

The spelling of 664288340787232 in words is "six hundred sixty-four trillion, two hundred eighty-eight billion, three hundred forty million, seven hundred eighty-seven thousand, two hundred thirty-two".