66755243 has 12 divisors (see below), whose sum is σ = 71646432. Its totient is φ = 62179200.

The previous prime is 66755239. The next prime is 66755261. The reversal of 66755243 is 34255766.

It is not a de Polignac number, because 66755243 - 2² = 66755239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66755197 and 66755206.

It is not an unprimeable number, because it can be changed into a prime (66755443) 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 11 ways as a sum of consecutive naturals, for example, 28046 + ... + 30332.

It is an arithmetic number, because the mean of its divisors is an integer number (5970536).

Almost surely, 2^66755243 is an apocalyptic number.

66755243 is a deficient number, since it is larger than the sum of its proper divisors (4891189).

66755243 is a wasteful number, since it uses less digits than its factorization.

66755243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2422 (or 2405 counting only the distinct ones).

The product of its digits is 151200, while the sum is 38.

The square root of 66755243 is about 8170.3881792728. The cubic root of 66755243 is about 405.6596332814.

The spelling of 66755243 in words is "sixty-six million, seven hundred fifty-five thousand, two hundred forty-three".