659666042880 has 544 divisors, whose sum is σ = 2330589179520. Its totient is φ = 158293032960.

The previous prime is 659666042873. The next prime is 659666042891. The reversal of 659666042880 is 88240666956.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 523959691 + ... + 523960949.

Almost surely, 2^659666042880 is an apocalyptic number.

659666042880 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 659666042880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1165294589760).

659666042880 is an abundant number, since it is smaller than the sum of its proper divisors (1670923136640).

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

659666042880 is a wasteful number, since it uses less digits than its factorization.

659666042880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353 (or 1323 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 60.

The spelling of 659666042880 in words is "six hundred fifty-nine billion, six hundred sixty-six million, forty-two thousand, eight hundred eighty".