1665159016680 has 96 divisors (see below), whose sum is σ = 5412028494600. Its totient is φ = 444020932608.

The previous prime is 1665159016667. The next prime is 1665159016699. The reversal of 1665159016680 is 866109515661.

1665159016680 is a `hidden beast` number, since 1 + 66 + 515 + 9 + 0 + 1 + 6 + 68 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1235392236324 + 429766780356 = 1111482^2 + 655566^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8200216 + ... + 8400824.

Almost surely, 2^{1665159016680} is an apocalyptic number.

1665159016680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1665159016680 is an abundant number, since it is smaller than the sum of its proper divisors (3746869477920).

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

1665159016680 is a wasteful number, since it uses less digits than its factorization.

1665159016680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223683 (or 223676 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 54.

The spelling of 1665159016680 in words is "one trillion, six hundred sixty-five billion, one hundred fifty-nine million, sixteen thousand, six hundred eighty".