66546875 has 14 divisors (see below), whose sum is σ = 83202060. Its totient is φ = 53225000.

The previous prime is 66546841. The next prime is 66546919. The reversal of 66546875 is 57864566.

It is not a de Polignac number, because 66546875 - 2⁶ = 66546811 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 13496 + ... + 17754.

Almost surely, 2^66546875 is an apocalyptic number.

66546875 is a deficient number, since it is larger than the sum of its proper divisors (16655185).

66546875 is an frugal number, since it uses more digits than its factorization.

66546875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4289 (or 4264 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 47.

The square root of 66546875 is about 8157.6267995049. The cubic root of 66546875 is about 405.2371217217.

The spelling of 66546875 in words is "sixty-six million, five hundred forty-six thousand, eight hundred seventy-five".