665636358311 has 8 divisors (see below), whose sum is σ = 669854797920. Its totient is φ = 661426399648.

The previous prime is 665636358271. The next prime is 665636358341. The reversal of 665636358311 is 113853636566.

665636358311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665636358311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665636358341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1962731 + ... + 2276748.

It is an arithmetic number, because the mean of its divisors is an integer number (83731849740).

Almost surely, 2^665636358311 is an apocalyptic number.

665636358311 is a deficient number, since it is larger than the sum of its proper divisors (4218439609).

665636358311 is a wasteful number, since it uses less digits than its factorization.

665636358311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4240473.

The product of its digits is 6998400, while the sum is 53.

The spelling of 665636358311 in words is "six hundred sixty-five billion, six hundred thirty-six million, three hundred fifty-eight thousand, three hundred eleven".