6521111166 has 16 divisors (see below), whose sum is σ = 13053279888. Its totient is φ = 2171860800.

The previous prime is 6521111161. The next prime is 6521111189. The reversal of 6521111166 is 6611111256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6521111161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 453055 + ... + 467226.

It is an arithmetic number, because the mean of its divisors is an integer number (815829993).

Almost surely, 2^6521111166 is an apocalyptic number.

6521111166 is an abundant number, since it is smaller than the sum of its proper divisors (6532168722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6521111166 is a wasteful number, since it uses less digits than its factorization.

6521111166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921467.

The product of its digits is 2160, while the sum is 30.

The square root of 6521111166 is about 80753.3972412307. The cubic root of 6521111166 is about 1868.2738478443.

The spelling of 6521111166 in words is "six billion, five hundred twenty-one million, one hundred eleven thousand, one hundred sixty-six".