659995800 has 96 divisors (see below), whose sum is σ = 2055203280. Its totient is φ = 175206400.

The previous prime is 659995753. The next prime is 659995801. The reversal of 659995800 is 8599956.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659995801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137440 + ... + 142160.

Almost surely, 2^659995800 is an apocalyptic number.

659995800 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 659995800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1027601640).

659995800 is an abundant number, since it is smaller than the sum of its proper divisors (1395207480).

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

659995800 is a wasteful number, since it uses less digits than its factorization.

659995800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4973 (or 4964 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 51.

The square root of 659995800 is about 25690.3834148111. The cubic root of 659995800 is about 870.6569222615.

The spelling of 659995800 in words is "six hundred fifty-nine million, nine hundred ninety-five thousand, eight hundred".