66755249 has 16 divisors (see below), whose sum is σ = 75349440. Its totient is φ = 58618560.

The previous prime is 66755239. The next prime is 66755261. The reversal of 66755249 is 94255766.

It is not a de Polignac number, because 66755249 - 2¹⁶ = 66689713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66755219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38207 + ... + 39915.

It is an arithmetic number, because the mean of its divisors is an integer number (4709340).

Almost surely, 2^66755249 is an apocalyptic number.

It is an amenable number.

66755249 is a deficient number, since it is larger than the sum of its proper divisors (8594191).

66755249 is a wasteful number, since it uses less digits than its factorization.

66755249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840.

The product of its digits is 453600, while the sum is 44.

The square root of 66755249 is about 8170.3885464524. The cubic root of 66755249 is about 405.6596454351.

The spelling of 66755249 in words is "sixty-six million, seven hundred fifty-five thousand, two hundred forty-nine".