66066040 has 32 divisors (see below), whose sum is σ = 156474000. Its totient is φ = 25035264.

The previous prime is 66065977. The next prime is 66066043. The reversal of 66066040 is 4066066.

66066040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66066043) by changing a digit.

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, 42705 + ... + 44224.

Almost surely, 2^66066040 is an apocalyptic number.

It is an amenable number.

66066040 is an abundant number, since it is smaller than the sum of its proper divisors (90407960).

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

66066040 is a wasteful number, since it uses less digits than its factorization.

66066040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86959 (or 86955 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 66066040 is about 8128.1018694404. The cubic root of 66066040 is about 404.2587467720.

The spelling of 66066040 in words is "sixty-six million, sixty-six thousand, forty", and thus it is an eban number.