2066716787 has 2 divisors, whose sum is σ = 2066716788. Its totient is φ = 2066716786.

The previous prime is 2066716753. The next prime is 2066716859. The reversal of 2066716787 is 7876176602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2066716787 - 2¹² = 2066712691 is a prime.

It is not a weakly prime, because it can be changed into another prime (2066716747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1033358393 + 1033358394.

It is an arithmetic number, because the mean of its divisors is an integer number (1033358394).

Almost surely, 2^2066716787 is an apocalyptic number.

2066716787 is a deficient number, since it is larger than the sum of its proper divisors (1).

2066716787 is an equidigital number, since it uses as much as digits as its factorization.

2066716787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1185408, while the sum is 50.

The square root of 2066716787 is about 45461.1569034489. The cubic root of 2066716787 is about 1273.7777418123. Note that the first 4 decimals are identical.

The spelling of 2066716787 in words is "two billion, sixty-six million, seven hundred sixteen thousand, seven hundred eighty-seven".