2123672166 has 48 divisors (see below), whose sum is σ = 5736676608. Its totient is φ = 551602800.

The previous prime is 2123672149. The next prime is 2123672171. The reversal of 2123672166 is 6612763212.

2123672166 is a `hidden beast` number, since 212 + 367 + 21 + 66 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 2123672166.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 764730 + ... + 767501.

It is an arithmetic number, because the mean of its divisors is an integer number (119514096).

Almost surely, 2^2123672166 is an apocalyptic number.

2123672166 is an abundant number, since it is smaller than the sum of its proper divisors (3613004442).

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

2123672166 is a wasteful number, since it uses less digits than its factorization.

2123672166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532257 (or 1532254 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 2123672166 is about 46083.3176540058. The cubic root of 2123672166 is about 1285.3729563872.

The spelling of 2123672166 in words is "two billion, one hundred twenty-three million, six hundred seventy-two thousand, one hundred sixty-six".