659866474880 has 64 divisors (see below), whose sum is σ = 1583188638480. Its totient is φ = 262993643520.

The previous prime is 659866474819. The next prime is 659866474903. The reversal of 659866474880 is 88474668956.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1683806 + ... + 2038365.

Almost surely, 2^659866474880 is an apocalyptic number.

It is an amenable number.

659866474880 is an abundant number, since it is smaller than the sum of its proper divisors (923322163600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

659866474880 is a wasteful number, since it uses less digits than its factorization.

659866474880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3722467 (or 3722455 counting only the distinct ones).

The product of its (nonzero) digits is 557383680, while the sum is 71.

The spelling of 659866474880 in words is "six hundred fifty-nine billion, eight hundred sixty-six million, four hundred seventy-four thousand, eight hundred eighty".