665434357411 has 2 divisors, whose sum is σ = 665434357412. Its totient is φ = 665434357410.

The previous prime is 665434357391. The next prime is 665434357417. The reversal of 665434357411 is 114753434566.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665434357411 - 2¹¹ = 665434355363 is a prime.

It is not a weakly prime, because it can be changed into another prime (665434357417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332717178705 + 332717178706.

It is an arithmetic number, because the mean of its divisors is an integer number (332717178706).

Almost surely, 2^665434357411 is an apocalyptic number.

665434357411 is a deficient number, since it is larger than the sum of its proper divisors (1).

665434357411 is an equidigital number, since it uses as much as digits as its factorization.

665434357411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3628800, while the sum is 49.

The spelling of 665434357411 in words is "six hundred sixty-five billion, four hundred thirty-four million, three hundred fifty-seven thousand, four hundred eleven".