166601500555 has 16 divisors (see below), whose sum is σ = 229012199424. Its totient is φ = 113975958240.

The previous prime is 166601500547. The next prime is 166601500577. The reversal of 166601500555 is 555005106661.

166601500555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166601500555 - 2³ = 166601500547 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5507007 + ... + 5537176.

It is an arithmetic number, because the mean of its divisors is an integer number (14313262464).

Almost surely, 2^166601500555 is an apocalyptic number.

166601500555 is a deficient number, since it is larger than the sum of its proper divisors (62410698869).

166601500555 is a wasteful number, since it uses less digits than its factorization.

166601500555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11044626.

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 166601500555 in words is "one hundred sixty-six billion, six hundred one million, five hundred thousand, five hundred fifty-five".