66240566 has 16 divisors (see below), whose sum is σ = 115699104. Its totient is φ = 27852864.

The previous prime is 66240563. The next prime is 66240569. The reversal of 66240566 is 66504266.

66240566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66240563) and next prime (66240569).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66240563) 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, 43895 + ... + 45378.

It is an arithmetic number, because the mean of its divisors is an integer number (7231194).

Almost surely, 2^66240566 is an apocalyptic number.

66240566 is a deficient number, since it is larger than the sum of its proper divisors (49458538).

66240566 is a wasteful number, since it uses less digits than its factorization.

66240566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89335.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 66240566 is about 8138.8307514040. The cubic root of 66240566 is about 404.6144092076.

The spelling of 66240566 in words is "sixty-six million, two hundred forty thousand, five hundred sixty-six".