6655115111 has 4 divisors (see below), whose sum is σ = 6665401872. Its totient is φ = 6644828352.

The previous prime is 6655115053. The next prime is 6655115119. The reversal of 6655115111 is 1115115566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1115115566 = 2 ⋅557557783.

It is a cyclic number.

It is not a de Polignac number, because 6655115111 - 2²⁶ = 6588006247 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 (6655115119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5142410 + ... + 5143703.

It is an arithmetic number, because the mean of its divisors is an integer number (1666350468).

Almost surely, 2^6655115111 is an apocalyptic number.

6655115111 is a deficient number, since it is larger than the sum of its proper divisors (10286761).

6655115111 is a wasteful number, since it uses less digits than its factorization.

6655115111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10286760.

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

The square root of 6655115111 is about 81578.8888806412. Note that the first 5 decimals coincide. The cubic root of 6655115111 is about 1880.9843862979.

The spelling of 6655115111 in words is "six billion, six hundred fifty-five million, one hundred fifteen thousand, one hundred eleven".