665362199077 has 2 divisors, whose sum is σ = 665362199078. Its totient is φ = 665362199076.

The previous prime is 665362199039. The next prime is 665362199081. The reversal of 665362199077 is 770991263566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 633689234116 + 31672964961 = 796046^2 + 177969^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665362199077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665362199977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332681099538 + 332681099539.

It is an arithmetic number, because the mean of its divisors is an integer number (332681099539).

Almost surely, 2^665362199077 is an apocalyptic number.

It is an amenable number.

665362199077 is a deficient number, since it is larger than the sum of its proper divisors (1).

665362199077 is an equidigital number, since it uses as much as digits as its factorization.

665362199077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25719120, while the sum is 61.

The spelling of 665362199077 in words is "six hundred sixty-five billion, three hundred sixty-two million, one hundred ninety-nine thousand, seventy-seven".