66707077 has 2 divisors, whose sum is σ = 66707078. Its totient is φ = 66707076.

The previous prime is 66707033. The next prime is 66707083. The reversal of 66707077 is 77070766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61481281 + 5225796 = 7841^2 + 2286^2 .

It is a cyclic number.

It is not a de Polignac number, because 66707077 - 2⁷ = 66706949 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66707027) 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, 33353538 + 33353539.

It is an arithmetic number, because the mean of its divisors is an integer number (33353539).

Almost surely, 2^66707077 is an apocalyptic number.

It is an amenable number.

66707077 is a deficient number, since it is larger than the sum of its proper divisors (1).

66707077 is an equidigital number, since it uses as much as digits as its factorization.

66707077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86436, while the sum is 40.

The square root of 66707077 is about 8167.4400518155. The cubic root of 66707077 is about 405.5620444268.

The spelling of 66707077 in words is "sixty-six million, seven hundred seven thousand, seventy-seven".