6606111151665 has 32 divisors (see below), whose sum is σ = 11754227088000. Its totient is φ = 3520250435520.

The previous prime is 6606111151621. The next prime is 6606111151681. The reversal of 6606111151665 is 5661511116066.

6606111151665 is a `hidden beast` number, since 6 + 6 + 0 + 61 + 1 + 11 + 516 + 65 = 666.

It is not a de Polignac number, because 6606111151665 - 2²⁴ = 6606094374449 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6606111151665.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20736090 + ... + 21052259.

It is an arithmetic number, because the mean of its divisors is an integer number (367319596500).

Almost surely, 2^{6606111151665} is an apocalyptic number.

It is an amenable number.

6606111151665 is a deficient number, since it is larger than the sum of its proper divisors (5148115936335).

6606111151665 is a wasteful number, since it uses less digits than its factorization.

6606111151665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41789534 (or 41789528 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The spelling of 6606111151665 in words is "six trillion, six hundred six billion, one hundred eleven million, one hundred fifty-one thousand, six hundred sixty-five".