6665561106 has 16 divisors (see below), whose sum is σ = 13338247104. Its totient is φ = 2220666224.

The previous prime is 6665561099. The next prime is 6665561113. The reversal of 6665561106 is 6011655666.

It is an interprime number because it is at equal distance from previous prime (6665561099) and next prime (6665561113).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284670 + ... + 307193.

It is an arithmetic number, because the mean of its divisors is an integer number (833640444).

Almost surely, 2^6665561106 is an apocalyptic number.

6665561106 is an abundant number, since it is smaller than the sum of its proper divisors (6672685998).

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

6665561106 is a wasteful number, since it uses less digits than its factorization.

6665561106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593745.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 6665561106 is about 81642.8876632864. The cubic root of 6665561106 is about 1881.9680147686.

The spelling of 6665561106 in words is "six billion, six hundred sixty-five million, five hundred sixty-one thousand, one hundred six".