66018105 has 32 divisors (see below), whose sum is σ = 118293120. Its totient is φ = 34931520.

The previous prime is 66018091. The next prime is 66018107. The reversal of 66018105 is 50181066.

It is not a de Polignac number, because 66018105 - 2⁸ = 66017849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66018107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15819 + ... + 19551.

It is an arithmetic number, because the mean of its divisors is an integer number (3696660).

Almost surely, 2^66018105 is an apocalyptic number.

It is an amenable number.

66018105 is a deficient number, since it is larger than the sum of its proper divisors (52275015).

66018105 is a wasteful number, since it uses less digits than its factorization.

66018105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3878 (or 3872 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 66018105 is about 8125.1526139513. The cubic root of 66018105 is about 404.1609515376.

It can be divided in two parts, 6601 and 8105, that added together give a triangular number (14706 = T₁₇₁).

The spelling of 66018105 in words is "sixty-six million, eighteen thousand, one hundred five".