166255126655 has 16 divisors (see below), whose sum is σ = 201054268800. Its totient is φ = 131975988480.

The previous prime is 166255126603. The next prime is 166255126673. The reversal of 166255126655 is 556621552661.

It is not a de Polignac number, because 166255126655 - 2¹² = 166255122559 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 88241 + ... + 583349.

It is an arithmetic number, because the mean of its divisors is an integer number (12565891800).

Almost surely, 2^166255126655 is an apocalyptic number.

166255126655 is a deficient number, since it is larger than the sum of its proper divisors (34799142145).

166255126655 is a wasteful number, since it uses less digits than its factorization.

166255126655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495634.

The product of its digits is 3240000, while the sum is 50.

The spelling of 166255126655 in words is "one hundred sixty-six billion, two hundred fifty-five million, one hundred twenty-six thousand, six hundred fifty-five".