2066178071 has 4 divisors (see below), whose sum is σ = 2071808352. Its totient is φ = 2060547792.

The previous prime is 2066178041. The next prime is 2066178089. The reversal of 2066178071 is 1708716602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2066178071 - 2⁶ = 2066178007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066178041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2814590 + ... + 2815323.

It is an arithmetic number, because the mean of its divisors is an integer number (517952088).

Almost surely, 2^2066178071 is an apocalyptic number.

2066178071 is a deficient number, since it is larger than the sum of its proper divisors (5630281).

2066178071 is an equidigital number, since it uses as much as digits as its factorization.

2066178071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5630280.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 2066178071 is about 45455.2315030954. The cubic root of 2066178071 is about 1273.6670567416.

The spelling of 2066178071 in words is "two billion, sixty-six million, one hundred seventy-eight thousand, seventy-one".