66012645 has 16 divisors (see below), whose sum is σ = 110212992. Its totient is φ = 33675840.

The previous prime is 66012643. The next prime is 66012647. The reversal of 66012645 is 54621066.

It is an interprime number because it is at equal distance from previous prime (66012643) and next prime (66012647).

It is not a de Polignac number, because 66012645 - 2¹ = 66012643 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66012641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95326 + ... + 96015.

It is an arithmetic number, because the mean of its divisors is an integer number (6888312).

Almost surely, 2^66012645 is an apocalyptic number.

It is an amenable number.

66012645 is a deficient number, since it is larger than the sum of its proper divisors (44200347).

66012645 is a wasteful number, since it uses less digits than its factorization.

66012645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191372.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 66012645 is about 8124.8166133150. The cubic root of 66012645 is about 404.1498092425.

The spelling of 66012645 in words is "sixty-six million, twelve thousand, six hundred forty-five".