66066549 has 16 divisors (see below), whose sum is σ = 91146240. Its totient is φ = 42522480.

The previous prime is 66066529. The next prime is 66066563. The reversal of 66066549 is 94566066.

66066549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66066549 - 2¹² = 66062453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66066549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66066529) 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 15 ways as a sum of consecutive naturals, for example, 76482 + ... + 77340.

It is an arithmetic number, because the mean of its divisors is an integer number (5696640).

Almost surely, 2^66066549 is an apocalyptic number.

It is an amenable number.

66066549 is a deficient number, since it is larger than the sum of its proper divisors (25079691).

66066549 is a wasteful number, since it uses less digits than its factorization.

66066549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1720.

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 66066549 is about 8128.1331805034. The cubic root of 66066549 is about 404.2597849613.

The spelling of 66066549 in words is "sixty-six million, sixty-six thousand, five hundred forty-nine".