16665516001005 has 16 divisors (see below), whose sum is σ = 27524981266944. Its totient is φ = 8601556645440.

The previous prime is 16665516000953. The next prime is 16665516001081. The reversal of 16665516001005 is 50010061556661.

It is not a de Polignac number, because 16665516001005 - 2²¹ = 16665513903853 is a prime.

It is a super-3 number, since 3×16665516001005³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 17919909214 + ... + 17919910143.

It is an arithmetic number, because the mean of its divisors is an integer number (1720311329184).

Almost surely, 2^{16665516001005} is an apocalyptic number.

16665516001005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16665516001005 is a deficient number, since it is larger than the sum of its proper divisors (10859465265939).

16665516001005 is a wasteful number, since it uses less digits than its factorization.

16665516001005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35839819396.

The product of its (nonzero) digits is 162000, while the sum is 42.

Adding to 16665516001005 its reverse (50010061556661), we get a palindrome (66675577557666).

The spelling of 16665516001005 in words is "sixteen trillion, six hundred sixty-five billion, five hundred sixteen million, one thousand, five".