665205166362311 has 8 divisors (see below), whose sum is σ = 676112176457424. Its totient is φ = 654298221021120.

The previous prime is 665205166362277. The next prime is 665205166362383. The reversal of 665205166362311 is 113263661502566.

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-665205166362311 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 (665205166362391) 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, 4745720 + ... + 36782226.

It is an arithmetic number, because the mean of its divisors is an integer number (84514022057178).

Almost surely, 2^{665205166362311} is an apocalyptic number.

665205166362311 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

665205166362311 is a deficient number, since it is larger than the sum of its proper divisors (10907010095113).

665205166362311 is a wasteful number, since it uses less digits than its factorization.

665205166362311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32376961.

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

The spelling of 665205166362311 in words is "six hundred sixty-five trillion, two hundred five billion, one hundred sixty-six million, three hundred sixty-two thousand, three hundred eleven".