665035642031 has 2 divisors, whose sum is σ = 665035642032. Its totient is φ = 665035642030.

The previous prime is 665035642001. The next prime is 665035642039. The reversal of 665035642031 is 130246530566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665035642031 - 2¹⁸ = 665035379887 is a prime.

It is a super-2 number, since 2×665035642031² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665035642031.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665035642039) 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, 332517821015 + 332517821016.

It is an arithmetic number, because the mean of its divisors is an integer number (332517821016).

Almost surely, 2^665035642031 is an apocalyptic number.

665035642031 is a deficient number, since it is larger than the sum of its proper divisors (1).

665035642031 is an equidigital number, since it uses as much as digits as its factorization.

665035642031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 388800, while the sum is 41.

The spelling of 665035642031 in words is "six hundred sixty-five billion, thirty-five million, six hundred forty-two thousand, thirty-one".