664798532495 has 4 divisors (see below), whose sum is σ = 797758239000. Its totient is φ = 531838825992.

The previous prime is 664798532413. The next prime is 664798532501. The reversal of 664798532495 is 594235897466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 664798532495 - 2²⁸ = 664530097039 is a prime.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 66479853245 + ... + 66479853254.

It is an arithmetic number, because the mean of its divisors is an integer number (199439559750).

Almost surely, 2^664798532495 is an apocalyptic number.

664798532495 is a deficient number, since it is larger than the sum of its proper divisors (132959706505).

664798532495 is a wasteful number, since it uses less digits than its factorization.

664798532495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132959706504.

The product of its digits is 391910400, while the sum is 68.

The spelling of 664798532495 in words is "six hundred sixty-four billion, seven hundred ninety-eight million, five hundred thirty-two thousand, four hundred ninety-five".