66000445 has 16 divisors (see below), whose sum is σ = 91099008. Its totient is φ = 44965440.

The previous prime is 66000421. The next prime is 66000469. The reversal of 66000445 is 54400066.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66000421) and next prime (66000469).

It is not a de Polignac number, because 66000445 - 2²¹ = 63903293 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 511 + ... + 11500.

It is an arithmetic number, because the mean of its divisors is an integer number (5693688).

Almost surely, 2^66000445 is an apocalyptic number.

It is an amenable number.

66000445 is a deficient number, since it is larger than the sum of its proper divisors (25098563).

66000445 is a wasteful number, since it uses less digits than its factorization.

66000445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12180.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 66000445 is about 8124.0657924465. The cubic root of 66000445 is about 404.1249103187.

The spelling of 66000445 in words is "sixty-six million, four hundred forty-five", and thus it is an aban number.