659646000000 has 672 divisors, whose sum is σ = 2556143062200. Its totient is φ = 162316800000.

The previous prime is 659645999959. The next prime is 659646000023. The reversal of 659646000000 is 646956.

It is a happy number.

659646000000 is a `hidden beast` number, since 6 + 5 + 9 + 646 + 0 + 0 + 0 + 0 + 0 + 0 = 666.

659646000000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 233998591 + ... + 234001409.

Almost surely, 2^659646000000 is an apocalyptic number.

659646000000 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 659646000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1278071531100).

659646000000 is an abundant number, since it is smaller than the sum of its proper divisors (1896497062200).

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

659646000000 is an equidigital number, since it uses as much as digits as its factorization.

659646000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2882 (or 2842 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

Adding to 659646000000 its reverse (646956), we get a palindrome (659646646956).

The spelling of 659646000000 in words is "six hundred fifty-nine billion, six hundred forty-six million", and thus it is an aban number.