2066166550 has 24 divisors (see below), whose sum is σ = 4392080496. Its totient is φ = 708399840.

The previous prime is 2066166547. The next prime is 2066166551. The reversal of 2066166550 is 556616602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066166551) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2951317 + ... + 2952016.

It is an arithmetic number, because the mean of its divisors is an integer number (183003354).

Almost surely, 2^2066166550 is an apocalyptic number.

2066166550 is an abundant number, since it is smaller than the sum of its proper divisors (2325913946).

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

2066166550 is a wasteful number, since it uses less digits than its factorization.

2066166550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5903352 (or 5903347 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 2066166550 is about 45455.1047738315. The cubic root of 2066166550 is about 1273.6646894165.

The spelling of 2066166550 in words is "two billion, sixty-six million, one hundred sixty-six thousand, five hundred fifty".