1660655001984 has 384 divisors, whose sum is σ = 5210581219200. Its totient is φ = 466543165440.

The previous prime is 1660655001913. The next prime is 1660655002129. The reversal of 1660655001984 is 4891005560661.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×1660655001984² (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 Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 52906807 + ... + 52938185.

It is an arithmetic number, because the mean of its divisors is an integer number (13569221925).

Almost surely, 2^{1660655001984} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1660655001984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2605290609600).

1660655001984 is an abundant number, since it is smaller than the sum of its proper divisors (3549926217216).

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

1660655001984 is a wasteful number, since it uses less digits than its factorization.

1660655001984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31502 (or 31479 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 51.

The spelling of 1660655001984 in words is "one trillion, six hundred sixty billion, six hundred fifty-five million, one thousand, nine hundred eighty-four".