664599595750 has 32 divisors (see below), whose sum is σ = 1246180366080. Its totient is φ = 265401820800.

The previous prime is 664599595661. The next prime is 664599595813. The reversal of 664599595750 is 57595995466.

It is a self number, because there is not a number n which added to its sum of digits gives 664599595750.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2038035 + ... + 2341534.

It is an arithmetic number, because the mean of its divisors is an integer number (38943136440).

Almost surely, 2^664599595750 is an apocalyptic number.

664599595750 is a deficient number, since it is larger than the sum of its proper divisors (581580770330).

664599595750 is a wasteful number, since it uses less digits than its factorization.

664599595750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4380193 (or 4380183 counting only the distinct ones).

The product of its (nonzero) digits is 459270000, while the sum is 70.

The spelling of 664599595750 in words is "six hundred sixty-four billion, five hundred ninety-nine million, five hundred ninety-five thousand, seven hundred fifty".