2066686819 has 2 divisors, whose sum is σ = 2066686820. Its totient is φ = 2066686818.

The previous prime is 2066686813. The next prime is 2066686849. The reversal of 2066686819 is 9186866602.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2066686819 is a prime.

It is a super-2 number, since 2×2066686819² = 8542388815656677522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2066686813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1033343409 + 1033343410.

It is an arithmetic number, because the mean of its divisors is an integer number (1033343410).

Almost surely, 2^2066686819 is an apocalyptic number.

2066686819 is a deficient number, since it is larger than the sum of its proper divisors (1).

2066686819 is an equidigital number, since it uses as much as digits as its factorization.

2066686819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 52.

The square root of 2066686819 is about 45460.8273021950. The cubic root of 2066686819 is about 1273.7715850655.

The spelling of 2066686819 in words is "two billion, sixty-six million, six hundred eighty-six thousand, eight hundred nineteen".