665357234011 has 16 divisors (see below), whose sum is σ = 695183892480. Its totient is φ = 636055277760.

The previous prime is 665357233969. The next prime is 665357234027. The reversal of 665357234011 is 110432753566.

It is a cyclic number.

It is not a de Polignac number, because 665357234011 - 2¹¹ = 665357231963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665357234411) 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 in 15 ways as a sum of consecutive naturals, for example, 33153366 + ... + 33173428.

It is an arithmetic number, because the mean of its divisors is an integer number (43448993280).

Almost surely, 2^665357234011 is an apocalyptic number.

665357234011 is a deficient number, since it is larger than the sum of its proper divisors (29826658469).

665357234011 is a wasteful number, since it uses less digits than its factorization.

665357234011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33066.

The product of its (nonzero) digits is 453600, while the sum is 43.

Adding to 665357234011 its reverse (110432753566), we get a palindrome (775789987577).

The spelling of 665357234011 in words is "six hundred sixty-five billion, three hundred fifty-seven million, two hundred thirty-four thousand, eleven".