665055011111 has 8 divisors (see below), whose sum is σ = 665286074880. Its totient is φ = 664824000312.

The previous prime is 665055011069. The next prime is 665055011113. The reversal of 665055011111 is 111110550566.

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-665055011111 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 (665055011113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62015996 + ... + 62026718.

It is an arithmetic number, because the mean of its divisors is an integer number (83160759360).

Almost surely, 2^665055011111 is an apocalyptic number.

665055011111 is a deficient number, since it is larger than the sum of its proper divisors (231063769).

665055011111 is a wasteful number, since it uses less digits than its factorization.

665055011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26485.

The product of its (nonzero) digits is 4500, while the sum is 32.

Adding to 665055011111 its reverse (111110550566), we get a palindrome (776165561677).

The spelling of 665055011111 in words is "six hundred sixty-five billion, fifty-five million, eleven thousand, one hundred eleven".