665135351 has 2 divisors, whose sum is σ = 665135352. Its totient is φ = 665135350.

The previous prime is 665135311. The next prime is 665135363. The reversal of 665135351 is 153531566.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665135351 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665135311) 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, 332567675 + 332567676.

It is an arithmetic number, because the mean of its divisors is an integer number (332567676).

Almost surely, 2^665135351 is an apocalyptic number.

665135351 is a deficient number, since it is larger than the sum of its proper divisors (1).

665135351 is an equidigital number, since it uses as much as digits as its factorization.

665135351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40500, while the sum is 35.

The square root of 665135351 is about 25790.2181262586. The cubic root of 665135351 is about 872.9110882352.

The spelling of 665135351 in words is "six hundred sixty-five million, one hundred thirty-five thousand, three hundred fifty-one".