665059972080 has 1280 divisors, whose sum is σ = 2631081885696. Its totient is φ = 135689748480.

The previous prime is 665059972069. The next prime is 665059972081. The reversal of 665059972080 is 80279950566.

It is a self number, because there is not a number n which added to its sum of digits gives 665059972080.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665059972081) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 5076793615 + ... + 5076793745.

Almost surely, 2^665059972080 is an apocalyptic number.

665059972080 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 665059972080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1315540942848).

665059972080 is an abundant number, since it is smaller than the sum of its proper divisors (1966021913616).

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

665059972080 is a wasteful number, since it uses less digits than its factorization.

665059972080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 57.

The spelling of 665059972080 in words is "six hundred sixty-five billion, fifty-nine million, nine hundred seventy-two thousand, eighty".