659444816 has 10 divisors (see below), whose sum is σ = 1277674362. Its totient is φ = 329722400.

The previous prime is 659444813. The next prime is 659444867. The reversal of 659444816 is 618444956.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 649230400 + 10214416 = 25480^2 + 3196^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659444813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20607635 + ... + 20607666.

Almost surely, 2^659444816 is an apocalyptic number.

It is an amenable number.

659444816 is a deficient number, since it is larger than the sum of its proper divisors (618229546).

659444816 is a wasteful number, since it uses less digits than its factorization.

659444816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41215309 (or 41215303 counting only the distinct ones).

The product of its digits is 829440, while the sum is 47.

The square root of 659444816 is about 25679.6576301165. The cubic root of 659444816 is about 870.4145714315.

The spelling of 659444816 in words is "six hundred fifty-nine million, four hundred forty-four thousand, eight hundred sixteen".