5111611115666 has 16 divisors (see below), whose sum is σ = 8364661097760. Its totient is φ = 2323402224480.

The previous prime is 5111611115641. The next prime is 5111611115669. The reversal of 5111611115666 is 6665111161115.

It is a super-2 number, since 2×5111611115666² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5111611115669) 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, 1950971 + ... + 3745598.

It is an arithmetic number, because the mean of its divisors is an integer number (522791318610).

Almost surely, 2^{5111611115666} is an apocalyptic number.

5111611115666 is a deficient number, since it is larger than the sum of its proper divisors (3253049982094).

5111611115666 is a wasteful number, since it uses less digits than its factorization.

5111611115666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5737369.

The product of its digits is 32400, while the sum is 41.

The spelling of 5111611115666 in words is "five trillion, one hundred eleven billion, six hundred eleven million, one hundred fifteen thousand, six hundred sixty-six".