669315836880 has 560 divisors, whose sum is σ = 2454408622080. Its totient is φ = 169336645632.

The previous prime is 669315836759. The next prime is 669315836971. The reversal of 669315836880 is 88638513966.

669315836880 is a `hidden beast` number, since 66 + 93 + 1 + 58 + 368 + 80 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 170350756 + ... + 170354684.

Almost surely, 2^669315836880 is an apocalyptic number.

669315836880 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 669315836880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1227204311040).

669315836880 is an abundant number, since it is smaller than the sum of its proper divisors (1785092785200).

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

669315836880 is a wasteful number, since it uses less digits than its factorization.

669315836880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4110 (or 4089 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 63.

The spelling of 669315836880 in words is "six hundred sixty-nine billion, three hundred fifteen million, eight hundred thirty-six thousand, eight hundred eighty".