166052052116065 has 16 divisors (see below), whose sum is σ = 199450784379600. Its totient is φ = 132716107763712.

The previous prime is 166052052116057. The next prime is 166052052116077. The reversal of 166052052116065 is 560611250250661.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1872343408896 + 164179708707169 = 1368336^2 + 12813263^2 .

It is a cyclic number.

It is not a de Polignac number, because 166052052116065 - 2³ = 166052052116057 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95265009 + ... + 96992401.

It is an arithmetic number, because the mean of its divisors is an integer number (12465674023725).

Almost surely, 2^{166052052116065} is an apocalyptic number.

It is an amenable number.

166052052116065 is a deficient number, since it is larger than the sum of its proper divisors (33398732263535).

166052052116065 is a wasteful number, since it uses less digits than its factorization.

166052052116065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745556.

The product of its (nonzero) digits is 648000, while the sum is 46.

The spelling of 166052052116065 in words is "one hundred sixty-six trillion, fifty-two billion, fifty-two million, one hundred sixteen thousand, sixty-five".