40066706777 has 2 divisors, whose sum is σ = 40066706778. Its totient is φ = 40066706776.

The previous prime is 40066706773. The next prime is 40066706789. The reversal of 40066706777 is 77760766004.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25201245001 + 14865461776 = 158749^2 + 121924^2 .

It is a cyclic number.

It is not a de Polignac number, because 40066706777 - 2² = 40066706773 is a prime.

It is not a weakly prime, because it can be changed into another prime (40066706773) 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, 20033353388 + 20033353389.

It is an arithmetic number, because the mean of its divisors is an integer number (20033353389).

Almost surely, 2^40066706777 is an apocalyptic number.

It is an amenable number.

40066706777 is a deficient number, since it is larger than the sum of its proper divisors (1).

40066706777 is an equidigital number, since it uses as much as digits as its factorization.

40066706777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2074464, while the sum is 50.

The spelling of 40066706777 in words is "forty billion, sixty-six million, seven hundred six thousand, seven hundred seventy-seven".