16666552052305 has 8 divisors (see below), whose sum is σ = 20540399286312. Its totient is φ = 12972883759488.

The previous prime is 16666552052287. The next prime is 16666552052309. The reversal of 16666552052305 is 50325025566661.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3892732946001 + 12773819106304 = 1973001^2 + 3574048^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16666552052305 - 2⁵ = 16666552052273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16666552052309) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 45044735092 + ... + 45044735461.

It is an arithmetic number, because the mean of its divisors is an integer number (2567549910789).

Almost surely, 2^{16666552052305} is an apocalyptic number.

It is an amenable number.

16666552052305 is a deficient number, since it is larger than the sum of its proper divisors (3873847234007).

16666552052305 is an equidigital number, since it uses as much as digits as its factorization.

16666552052305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90089470595.

The product of its (nonzero) digits is 9720000, while the sum is 52.

The spelling of 16666552052305 in words is "sixteen trillion, six hundred sixty-six billion, five hundred fifty-two million, fifty-two thousand, three hundred five".