1665982027320 has 384 divisors, whose sum is σ = 5590852787520. Its totient is φ = 394774732800.

The previous prime is 1665982027291. The next prime is 1665982027337. The reversal of 1665982027320 is 237202895661.

It is a happy number.

It is a super-2 number, since 2×1665982027320² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 295331700 + ... + 295337340.

Almost surely, 2^{1665982027320} is an apocalyptic number.

1665982027320 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 1665982027320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2795426393760).

1665982027320 is an abundant number, since it is smaller than the sum of its proper divisors (3924870760200).

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

1665982027320 is a wasteful number, since it uses less digits than its factorization.

1665982027320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5927 (or 5892 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 1665982027320 in words is "one trillion, six hundred sixty-five billion, nine hundred eighty-two million, twenty-seven thousand, three hundred twenty".