665034166611 has 12 divisors (see below), whose sum is σ = 960814568688. Its totient is φ = 443259344304.

The previous prime is 665034166549. The next prime is 665034166639. The reversal of 665034166611 is 116661430566.

It is not a de Polignac number, because 665034166611 - 2¹⁵ = 665034133843 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (665034166651) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 8020360 + ... + 8102853.

It is an arithmetic number, because the mean of its divisors is an integer number (80067880724).

Almost surely, 2^665034166611 is an apocalyptic number.

665034166611 is a deficient number, since it is larger than the sum of its proper divisors (295780402077).

665034166611 is a wasteful number, since it uses less digits than its factorization.

665034166611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16127802 (or 16127799 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 665034166611 in words is "six hundred sixty-five billion, thirty-four million, one hundred sixty-six thousand, six hundred eleven".