1665111116 has 12 divisors (see below), whose sum is σ = 2918370840. Its totient is φ = 831290880.

The previous prime is 1665111109. The next prime is 1665111127. The reversal of 1665111116 is 6111115661.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313205 + ... + 318476.

It is an arithmetic number, because the mean of its divisors is an integer number (243197570).

Almost surely, 2^1665111116 is an apocalyptic number.

It is an amenable number.

1665111116 is a deficient number, since it is larger than the sum of its proper divisors (1253259724).

1665111116 is a wasteful number, since it uses less digits than its factorization.

1665111116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632344 (or 632342 counting only the distinct ones).

The product of its digits is 1080, while the sum is 29.

The square root of 1665111116 is about 40805.7730719564. The cubic root of 1665111116 is about 1185.2621248304.

Adding to 1665111116 its reverse (6111115661), we get a palindrome (7776226777).

The spelling of 1665111116 in words is "one billion, six hundred sixty-five million, one hundred eleven thousand, one hundred sixteen".