2066175817 has 2 divisors, whose sum is σ = 2066175818. Its totient is φ = 2066175816.

The previous prime is 2066175809. The next prime is 2066175841. The reversal of 2066175817 is 7185716602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1720922256 + 345253561 = 41484^2 + 18581^2 .

It is a cyclic number.

It is not a de Polignac number, because 2066175817 - 2³ = 2066175809 is a prime.

It is not a weakly prime, because it can be changed into another prime (2066175877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1033087908 + 1033087909.

It is an arithmetic number, because the mean of its divisors is an integer number (1033087909).

Almost surely, 2^2066175817 is an apocalyptic number.

It is an amenable number.

2066175817 is a deficient number, since it is larger than the sum of its proper divisors (1).

2066175817 is an equidigital number, since it uses as much as digits as its factorization.

2066175817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 2066175817 is about 45455.2067094629. The cubic root of 2066175817 is about 1273.6665935923. Note that the first 3 decimals are identical.

The spelling of 2066175817 in words is "two billion, sixty-six million, one hundred seventy-five thousand, eight hundred seventeen".