16061661166555 has 32 divisors (see below), whose sum is σ = 19827620536320. Its totient is φ = 12487107790080.

The previous prime is 16061661166519. The next prime is 16061661166583. The reversal of 16061661166555 is 55566116616061.

It is a de Polignac number, because none of the positive numbers 2^k-16061661166555 is a prime.

It is a super-3 number, since 3×16061661166555³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16061661166496 and 16061661166505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4719060 + ... + 7375150.

It is an arithmetic number, because the mean of its divisors is an integer number (619613141760).

Almost surely, 2^{16061661166555} is an apocalyptic number.

16061661166555 is a deficient number, since it is larger than the sum of its proper divisors (3765959369765).

16061661166555 is a wasteful number, since it uses less digits than its factorization.

16061661166555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2656419.

The product of its (nonzero) digits is 5832000, while the sum is 55.

The spelling of 16061661166555 in words is "sixteen trillion, sixty-one billion, six hundred sixty-one million, one hundred sixty-six thousand, five hundred fifty-five".