66885241 has 4 divisors (see below), whose sum is σ = 67064932. Its totient is φ = 66705552.

The previous prime is 66885211. The next prime is 66885349. The reversal of 66885241 is 14258866.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46635241 + 20250000 = 6829^2 + 4500^2 .

It is a cyclic number.

It is not a de Polignac number, because 66885241 - 2⁵ = 66885209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66885194 and 66885203.

It is not an unprimeable number, because it can be changed into a prime (66885211) 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 3 ways as a sum of consecutive naturals, for example, 89286 + ... + 90031.

It is an arithmetic number, because the mean of its divisors is an integer number (16766233).

Almost surely, 2^66885241 is an apocalyptic number.

It is an amenable number.

66885241 is a deficient number, since it is larger than the sum of its proper divisors (179691).

66885241 is a wasteful number, since it uses less digits than its factorization.

66885241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179690.

The product of its digits is 92160, while the sum is 40.

The square root of 66885241 is about 8178.3397459387. The cubic root of 66885241 is about 405.9227873745.

The spelling of 66885241 in words is "sixty-six million, eight hundred eighty-five thousand, two hundred forty-one".