166628520017 has 8 divisors (see below), whose sum is σ = 168247449120. Its totient is φ = 165016867680.

The previous prime is 166628520011. The next prime is 166628520043. The reversal of 166628520017 is 710025826661.

166628520017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 166628520017 - 2¹⁴ = 166628503633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166628520017.

It is not an unprimeable number, because it can be changed into a prime (166628520011) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1773167 + ... + 1864772.

It is an arithmetic number, because the mean of its divisors is an integer number (21030931140).

Almost surely, 2^166628520017 is an apocalyptic number.

It is an amenable number.

166628520017 is a deficient number, since it is larger than the sum of its proper divisors (1618929103).

166628520017 is a wasteful number, since it uses less digits than its factorization.

166628520017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3638383.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 166628520017 in words is "one hundred sixty-six billion, six hundred twenty-eight million, five hundred twenty thousand, seventeen".