665073500762880 has 1728 divisors, whose sum is σ = 2597572006848000. Its totient is φ = 155731183534080.

The previous prime is 665073500762863. The next prime is 665073500762897. The reversal of 665073500762880 is 88267005370566.

It is a happy number.

665073500762880 is a `hidden beast` number, since 6 + 6 + 50 + 7 + 3 + 500 + 76 + 2 + 8 + 8 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (665073500762863) and next prime (665073500762897).

It is a super-2 number, since 2×665073500762880² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 224914946362 + ... + 224914949318.

It is an arithmetic number, because the mean of its divisors is an integer number (1503224541000).

Almost surely, 2^{665073500762880} is an apocalyptic number.

665073500762880 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 665073500762880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1298786003424000).

665073500762880 is an abundant number, since it is smaller than the sum of its proper divisors (1932498506085120).

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

665073500762880 is a wasteful number, since it uses less digits than its factorization.

665073500762880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3570 (or 3553 counting only the distinct ones).

The product of its (nonzero) digits is 101606400, while the sum is 63.

The spelling of 665073500762880 in words is "six hundred sixty-five trillion, seventy-three billion, five hundred million, seven hundred sixty-two thousand, eight hundred eighty".