664885468075 has 24 divisors (see below), whose sum is σ = 851458646016. Its totient is φ = 514504932000.

The previous prime is 664885467997. The next prime is 664885468081. The reversal of 664885468075 is 570864588466.

It is not a de Polignac number, because 664885468075 - 2¹¹ = 664885466027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 664885468075.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1432824 + ... + 1839226.

It is an arithmetic number, because the mean of its divisors is an integer number (35477443584).

Almost surely, 2^664885468075 is an apocalyptic number.

664885468075 is a deficient number, since it is larger than the sum of its proper divisors (186573177941).

664885468075 is a wasteful number, since it uses less digits than its factorization.

664885468075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408555 (or 408550 counting only the distinct ones).

The product of its (nonzero) digits is 309657600, while the sum is 67.

The spelling of 664885468075 in words is "six hundred sixty-four billion, eight hundred eighty-five million, four hundred sixty-eight thousand, seventy-five".