66853305 has 24 divisors (see below), whose sum is σ = 121979520. Its totient is φ = 33778080.

The previous prime is 66853271. The next prime is 66853307. The reversal of 66853305 is 50335866.

It is not a de Polignac number, because 66853305 - 2⁷ = 66853177 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66853305.

It is not an unprimeable number, because it can be changed into a prime (66853307) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38241 + ... + 39950.

It is an arithmetic number, because the mean of its divisors is an integer number (5082480).

Almost surely, 2^66853305 is an apocalyptic number.

It is an amenable number.

66853305 is a deficient number, since it is larger than the sum of its proper divisors (55126215).

66853305 is a wasteful number, since it uses less digits than its factorization.

66853305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78221 (or 78218 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 66853305 is about 8176.3870382951. The cubic root of 66853305 is about 405.8581711565.

The spelling of 66853305 in words is "sixty-six million, eight hundred fifty-three thousand, three hundred five".