166823055 has 48 divisors (see below), whose sum is σ = 338554944. Its totient is φ = 74396160.

The previous prime is 166823011. The next prime is 166823077. The reversal of 166823055 is 550328661.

166823055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 12916²-1.

It is not a de Polignac number, because 166823055 - 2⁶ = 166822991 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6457 + ... + 19373.

It is an arithmetic number, because the mean of its divisors is an integer number (7053228).

Almost surely, 2^166823055 is an apocalyptic number.

166823055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166823055 is an abundant number, since it is smaller than the sum of its proper divisors (171731889).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166823055 is a wasteful number, since it uses less digits than its factorization.

166823055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12976 (or 12973 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 166823055 is about 12915.9999612883. Note that the first 4 decimals coincide. The cubic root of 166823055 is about 550.4932819727.

The spelling of 166823055 in words is "one hundred sixty-six million, eight hundred twenty-three thousand, fifty-five".