659919020 has 48 divisors (see below), whose sum is σ = 1461663840. Its totient is φ = 249578496.

The previous prime is 659919011. The next prime is 659919023. The reversal of 659919020 is 20919956.

It is a super-2 number, since 2×659919020² = 870986225915520800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (659919023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231524 + ... + 234356.

It is an arithmetic number, because the mean of its divisors is an integer number (30451330).

Almost surely, 2^659919020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 659919020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (730831920).

659919020 is an abundant number, since it is smaller than the sum of its proper divisors (801744820).

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

659919020 is a wasteful number, since it uses less digits than its factorization.

659919020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3474 (or 3472 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 41.

The square root of 659919020 is about 25688.8890378700. The cubic root of 659919020 is about 870.6231585967.

The spelling of 659919020 in words is "six hundred fifty-nine million, nine hundred nineteen thousand, twenty".