540065321666 has 128 divisors (see below), whose sum is σ = 968146421760. Its totient is φ = 223556889600.

The previous prime is 540065321651. The next prime is 540065321693. The reversal of 540065321666 is 666123560045.

It is a super-3 number, since 3×540065321666³ (a number of 36 digits) contains 333 as substring.

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 63 ways as a sum of consecutive naturals, for example, 613013546 + ... + 613014426.

It is an arithmetic number, because the mean of its divisors is an integer number (7563643920).

Almost surely, 2^540065321666 is an apocalyptic number.

540065321666 is a deficient number, since it is larger than the sum of its proper divisors (428081100094).

540065321666 is a wasteful number, since it uses less digits than its factorization.

540065321666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432.

The product of its (nonzero) digits is 777600, while the sum is 44.

The spelling of 540065321666 in words is "five hundred forty billion, sixty-five million, three hundred twenty-one thousand, six hundred sixty-six".