66068109 has 16 divisors (see below), whose sum is σ = 98351040. Its totient is φ = 43832880.

The previous prime is 66068071. The next prime is 66068117. The reversal of 66068109 is 90186066.

It is not a de Polignac number, because 66068109 - 2¹⁷ = 65937037 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66068309) 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, 102 + ... + 11495.

It is an arithmetic number, because the mean of its divisors is an integer number (6146940).

Almost surely, 2^66068109 is an apocalyptic number.

It is an amenable number.

66068109 is a deficient number, since it is larger than the sum of its proper divisors (32282931).

66068109 is a wasteful number, since it uses less digits than its factorization.

66068109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11817 (or 11811 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 66068109 is about 8128.2291429314. The cubic root of 66068109 is about 404.2629668050.

The spelling of 66068109 in words is "sixty-six million, sixty-eight thousand, one hundred nine".