664885628144 has 20 divisors (see below), whose sum is σ = 1288250839824. Its totient is φ = 332433798528.

The previous prime is 664885628093. The next prime is 664885628203. The reversal of 664885628144 is 441826588466.

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, 66284 + ... + 1155060.

Almost surely, 2^664885628144 is an apocalyptic number.

It is an amenable number.

664885628144 is a deficient number, since it is larger than the sum of its proper divisors (623365211680).

664885628144 is a wasteful number, since it uses less digits than its factorization.

664885628144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126952 (or 1126946 counting only the distinct ones).

The product of its digits is 70778880, while the sum is 62.

The spelling of 664885628144 in words is "six hundred sixty-four billion, eight hundred eighty-five million, six hundred twenty-eight thousand, one hundred forty-four".