2666816077 has 2 divisors, whose sum is σ = 2666816078. Its totient is φ = 2666816076.

The previous prime is 2666816069. The next prime is 2666816081. The reversal of 2666816077 is 7706186662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1843929481 + 822886596 = 42941^2 + 28686^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666816077 - 2³ = 2666816069 is a prime.

It is a super-2 number, since 2×2666816077² = 14223815977091339858, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2666816077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2666816377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333408038 + 1333408039.

It is an arithmetic number, because the mean of its divisors is an integer number (1333408039).

Almost surely, 2^2666816077 is an apocalyptic number.

It is an amenable number.

2666816077 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666816077 is an equidigital number, since it uses as much as digits as its factorization.

2666816077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The square root of 2666816077 is about 51641.2245885010. The cubic root of 2666816077 is about 1386.7484470524.

The spelling of 2666816077 in words is "two billion, six hundred sixty-six million, eight hundred sixteen thousand, seventy-seven".