1665532416000 has 832 divisors, whose sum is σ = 5742844563456. Its totient is φ = 428359680000.

The previous prime is 1665532415929. The next prime is 1665532416007. The reversal of 1665532416000 is 6142355661.

It is a self number, because there is not a number n which added to its sum of digits gives 1665532416000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665532416007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9973247917 + ... + 9973248083.

It is an arithmetic number, because the mean of its divisors is an integer number (6902457408).

Almost surely, 2^{1665532416000} is an apocalyptic number.

1665532416000 is a gapful number since it is divisible by the number (10) 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 1665532416000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2871422281728).

1665532416000 is an abundant number, since it is smaller than the sum of its proper divisors (4077312147456).

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

1665532416000 is a wasteful number, since it uses less digits than its factorization.

1665532416000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 1665532416000 in words is "one trillion, six hundred sixty-five billion, five hundred thirty-two million, four hundred sixteen thousand".