5666501111 has 4 divisors (see below), whose sum is σ = 5680025400. Its totient is φ = 5652976824.

The previous prime is 5666501101. The next prime is 5666501117. The reversal of 5666501111 is 1111056665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1111056665 = 5 ⋅222211333.

It is a cyclic number.

It is not a de Polignac number, because 5666501111 - 2¹⁸ = 5666238967 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 (5666501117) 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 3 ways as a sum of consecutive naturals, for example, 6761516 + ... + 6762353.

It is an arithmetic number, because the mean of its divisors is an integer number (1420006350).

Almost surely, 2^5666501111 is an apocalyptic number.

5666501111 is a deficient number, since it is larger than the sum of its proper divisors (13524289).

5666501111 is a wasteful number, since it uses less digits than its factorization.

5666501111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13524288.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 5666501111 is about 75276.1656236554. The cubic root of 5666501111 is about 1782.8097180602.

Adding to 5666501111 its reverse (1111056665), we get a palindrome (6777557776).

The spelling of 5666501111 in words is "five billion, six hundred sixty-six million, five hundred one thousand, one hundred eleven".