66575055 has 16 divisors (see below), whose sum is σ = 106629120. Its totient is φ = 35470368.

The previous prime is 66575027. The next prime is 66575057. The reversal of 66575055 is 55057566.

It is not a de Polignac number, because 66575055 - 2⁸ = 66574799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66575057) 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, 19786 + ... + 22904.

It is an arithmetic number, because the mean of its divisors is an integer number (6664320).

Almost surely, 2^66575055 is an apocalyptic number.

66575055 is a deficient number, since it is larger than the sum of its proper divisors (40054065).

66575055 is a wasteful number, since it uses less digits than its factorization.

66575055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4550.

The product of its (nonzero) digits is 157500, while the sum is 39.

The square root of 66575055 is about 8159.3538347102. The cubic root of 66575055 is about 405.2943143425.

The spelling of 66575055 in words is "sixty-six million, five hundred seventy-five thousand, fifty-five".