166855606855 has 16 divisors (see below), whose sum is σ = 240874260480. Its totient is φ = 108393416352.

The previous prime is 166855606843. The next prime is 166855606877. The reversal of 166855606855 is 558606558661.

166855606855 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 166855606855 - 2²³ = 166847218247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166855606793 and 166855606802.

It is a congruent 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, 125454679 + ... + 125456008.

It is an arithmetic number, because the mean of its divisors is an integer number (15054641280).

Almost surely, 2^166855606855 is an apocalyptic number.

166855606855 is a deficient number, since it is larger than the sum of its proper divisors (74018653625).

166855606855 is a wasteful number, since it uses less digits than its factorization.

166855606855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250910718.

The product of its (nonzero) digits is 51840000, while the sum is 61.

The spelling of 166855606855 in words is "one hundred sixty-six billion, eight hundred fifty-five million, six hundred six thousand, eight hundred fifty-five".