659661912000 has 2016 divisors, whose sum is σ = 3115830070080. Its totient is φ = 131681894400.

The previous prime is 659661911983. The next prime is 659661912001. The reversal of 659661912000 is 219166956.

It is a happy number.

659661912000 is a `hidden beast` number, since 6 + 5 + 9 + 6 + 619 + 1 + 20 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (2016).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659661912001) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 871415622 + ... + 871416378.

It is an arithmetic number, because the mean of its divisors is an integer number (1545550630).

Almost surely, 2^659661912000 is an apocalyptic number.

659661912000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 659661912000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1557915035040).

659661912000 is an abundant number, since it is smaller than the sum of its proper divisors (2456168158080).

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

659661912000 is a wasteful number, since it uses less digits than its factorization.

659661912000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836 (or 806 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The spelling of 659661912000 in words is "six hundred fifty-nine billion, six hundred sixty-one million, nine hundred twelve thousand".