66182785 has 16 divisors (see below), whose sum is σ = 86994000. Its totient is φ = 48111616.

The previous prime is 66182777. The next prime is 66182791. The reversal of 66182785 is 58728166.

It can be written as a sum of positive squares in 8 ways, for example, as 53361 + 66129424 = 231^2 + 8132^2 .

It is a cyclic number.

It is not a de Polignac number, because 66182785 - 2³ = 66182777 is a prime.

It is a super-3 number, since 3×66182785³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10960 + ... + 15889.

It is an arithmetic number, because the mean of its divisors is an integer number (5437125).

Almost surely, 2^66182785 is an apocalyptic number.

It is an amenable number.

66182785 is a deficient number, since it is larger than the sum of its proper divisors (20811215).

66182785 is a wasteful number, since it uses less digits than its factorization.

66182785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26900.

The product of its digits is 161280, while the sum is 43.

The square root of 66182785 is about 8135.2802656086. The cubic root of 66182785 is about 404.4967279152.

The spelling of 66182785 in words is "sixty-six million, one hundred eighty-two thousand, seven hundred eighty-five".