665362199977 has 2 divisors, whose sum is σ = 665362199978. Its totient is φ = 665362199976.

The previous prime is 665362199941. The next prime is 665362200011. The reversal of 665362199977 is 779991263566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399530183056 + 265832016921 = 632084^2 + 515589^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665362199977 is a prime.

It is not a weakly prime, because it can be changed into another prime (665362199077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332681099988 + 332681099989.

It is an arithmetic number, because the mean of its divisors is an integer number (332681099989).

Almost surely, 2^665362199977 is an apocalyptic number.

It is an amenable number.

665362199977 is a deficient number, since it is larger than the sum of its proper divisors (1).

665362199977 is an equidigital number, since it uses as much as digits as its factorization.

665362199977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 231472080, while the sum is 70.

The spelling of 665362199977 in words is "six hundred sixty-five billion, three hundred sixty-two million, one hundred ninety-nine thousand, nine hundred seventy-seven".