2066776617 has 4 divisors (see below), whose sum is σ = 2755702160. Its totient is φ = 1377851076.

The previous prime is 2066776597. The next prime is 2066776631. The reversal of 2066776617 is 7166776602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2066776617 - 2¹⁴ = 2066760233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2066776687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344462767 + ... + 344462772.

It is an arithmetic number, because the mean of its divisors is an integer number (688925540).

Almost surely, 2^2066776617 is an apocalyptic number.

It is an amenable number.

2066776617 is a deficient number, since it is larger than the sum of its proper divisors (688925543).

2066776617 is an equidigital number, since it uses as much as digits as its factorization.

2066776617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688925542.

The product of its (nonzero) digits is 889056, while the sum is 48.

The square root of 2066776617 is about 45461.8149329742. The cubic root of 2066776617 is about 1273.7900333508.

The spelling of 2066776617 in words is "two billion, sixty-six million, seven hundred seventy-six thousand, six hundred seventeen".