662664712777 has 2 divisors, whose sum is σ = 662664712778. Its totient is φ = 662664712776.

The previous prime is 662664712771. The next prime is 662664712783. The reversal of 662664712777 is 777217466266.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (662664712771) and next prime (662664712783).

It can be written as a sum of positive squares in only one way, i.e., 587904029001 + 74760683776 = 766749^2 + 273424^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-662664712777 is a prime.

It is not a weakly prime, because it can be changed into another prime (662664712771) 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, 331332356388 + 331332356389.

It is an arithmetic number, because the mean of its divisors is an integer number (331332356389).

Almost surely, 2^662664712777 is an apocalyptic number.

It is an amenable number.

662664712777 is a deficient number, since it is larger than the sum of its proper divisors (1).

662664712777 is an equidigital number, since it uses as much as digits as its factorization.

662664712777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49787136, while the sum is 61.

The spelling of 662664712777 in words is "six hundred sixty-two billion, six hundred sixty-four million, seven hundred twelve thousand, seven hundred seventy-seven".