66500546 has 12 divisors (see below), whose sum is σ = 116036838. Its totient is φ = 28500192.

The previous prime is 66500543. The next prime is 66500557. The reversal of 66500546 is 64500566.

It can be written as a sum of positive squares in only one way, i.e., 62236321 + 4264225 = 7889^2 + 2065^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66500543) 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 5 ways as a sum of consecutive naturals, for example, 339191 + ... + 339386.

Almost surely, 2^66500546 is an apocalyptic number.

66500546 is a deficient number, since it is larger than the sum of its proper divisors (49536292).

66500546 is a wasteful number, since it uses less digits than its factorization.

66500546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678593 (or 678586 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 66500546 is about 8154.7866924893. The cubic root of 66500546 is about 405.1430597587.

The spelling of 66500546 in words is "sixty-six million, five hundred thousand, five hundred forty-six".