664561001485 has 32 divisors (see below), whose sum is σ = 845288294400. Its totient is φ = 500163854400.

The previous prime is 664561001479. The next prime is 664561001537. The reversal of 664561001485 is 584100165466.

It is not a de Polignac number, because 664561001485 - 2⁵ = 664561001453 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 31 ways as a sum of consecutive naturals, for example, 57646792 + ... + 57658318.

It is an arithmetic number, because the mean of its divisors is an integer number (26415259200).

Almost surely, 2^664561001485 is an apocalyptic number.

It is an amenable number.

664561001485 is a deficient number, since it is larger than the sum of its proper divisors (180727292915).

664561001485 is a wasteful number, since it uses less digits than its factorization.

664561001485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15721.

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 664561001485 in words is "six hundred sixty-four billion, five hundred sixty-one million, one thousand, four hundred eighty-five".