66402014839777 has 2 divisors, whose sum is σ = 66402014839778. Its totient is φ = 66402014839776.

The previous prime is 66402014839663. The next prime is 66402014839841. The reversal of 66402014839777 is 77793841020466.

It is an a-pointer prime, because the next prime (66402014839841) can be obtained adding 66402014839777 to its sum of digits (64).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45780325725456 + 20621689114321 = 6766116^2 + 4541111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66402014839777 is a prime.

It is not a weakly prime, because it can be changed into another prime (66402014839477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33201007419888 + 33201007419889.

It is an arithmetic number, because the mean of its divisors is an integer number (33201007419889).

Almost surely, 2^{66402014839777} is an apocalyptic number.

It is an amenable number.

66402014839777 is a deficient number, since it is larger than the sum of its proper divisors (1).

66402014839777 is an equidigital number, since it uses as much as digits as its factorization.

66402014839777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 85349376, while the sum is 64.

The spelling of 66402014839777 in words is "sixty-six trillion, four hundred two billion, fourteen million, eight hundred thirty-nine thousand, seven hundred seventy-seven".