6511166650911 has 16 divisors (see below), whose sum is σ = 9404689209440. Its totient is φ = 4006871781120.

The previous prime is 6511166650907. The next prime is 6511166650939. The reversal of 6511166650911 is 1190566611156.

It is a happy number.

It is not a de Polignac number, because 6511166650911 - 2² = 6511166650907 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 (6511166658911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 493937170 + ... + 493950351.

It is an arithmetic number, because the mean of its divisors is an integer number (587793075590).

Almost surely, 2^{6511166650911} is an apocalyptic number.

6511166650911 is a deficient number, since it is larger than the sum of its proper divisors (2893522558529).

6511166650911 is an equidigital number, since it uses as much as digits as its factorization.

6511166650911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987887563 (or 987887537 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 48.

The spelling of 6511166650911 in words is "six trillion, five hundred eleven billion, one hundred sixty-six million, six hundred fifty thousand, nine hundred eleven".