66185164 has 6 divisors (see below), whose sum is σ = 115824044. Its totient is φ = 33092580.

The previous prime is 66185159. The next prime is 66185177. The reversal of 66185164 is 46158166.

It is a zygodrome in base 2.

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 as a sum of consecutive naturals, namely, 8273142 + ... + 8273149.

Almost surely, 2^66185164 is an apocalyptic number.

It is an amenable number.

66185164 is a deficient number, since it is larger than the sum of its proper divisors (49638880).

66185164 is a wasteful number, since it uses less digits than its factorization.

66185164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16546295 (or 16546293 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 66185164 is about 8135.4264792941. The cubic root of 66185164 is about 404.5015745239.

The spelling of 66185164 in words is "sixty-six million, one hundred eighty-five thousand, one hundred sixty-four".