166026255505 has 16 divisors (see below), whose sum is σ = 219785529600. Its totient is φ = 119389663360.

The previous prime is 166026255503. The next prime is 166026255517. The reversal of 166026255505 is 505552620661.

It is not a de Polignac number, because 166026255505 - 2¹ = 166026255503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166026255503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16953865 + ... + 16963654.

It is an arithmetic number, because the mean of its divisors is an integer number (13736595600).

Almost surely, 2^166026255505 is an apocalyptic number.

It is an amenable number.

166026255505 is a deficient number, since it is larger than the sum of its proper divisors (53759274095).

166026255505 is a wasteful number, since it uses less digits than its factorization.

166026255505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33917624.

The product of its (nonzero) digits is 540000, while the sum is 43.

The spelling of 166026255505 in words is "one hundred sixty-six billion, twenty-six million, two hundred fifty-five thousand, five hundred five".