666005505111 has 24 divisors (see below), whose sum is σ = 965280236544. Its totient is φ = 442493918160.

The previous prime is 666005505103. The next prime is 666005505133. The reversal of 666005505111 is 111505500666.

It is not a de Polignac number, because 666005505111 - 2³ = 666005505103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666005505211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17578390 + ... + 17616236.

It is an arithmetic number, because the mean of its divisors is an integer number (40220009856).

Almost surely, 2^666005505111 is an apocalyptic number.

666005505111 is a deficient number, since it is larger than the sum of its proper divisors (299274731433).

666005505111 is a wasteful number, since it uses less digits than its factorization.

666005505111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44451 (or 44448 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 666005505111 in words is "six hundred sixty-six billion, five million, five hundred five thousand, one hundred eleven".