66575056 has 10 divisors (see below), whose sum is σ = 128989202. Its totient is φ = 33287520.

The previous prime is 66575027. The next prime is 66575057. The reversal of 66575056 is 65057566.

It can be written as a sum of positive squares in only one way, i.e., 65869456 + 705600 = 8116^2 + 840^2 .

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2080455 + ... + 2080486.

Almost surely, 2^66575056 is an apocalyptic number.

It is an amenable number.

66575056 is a deficient number, since it is larger than the sum of its proper divisors (62414146).

66575056 is a wasteful number, since it uses less digits than its factorization.

66575056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4160949 (or 4160943 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 40.

The square root of 66575056 is about 8159.3538959896. The cubic root of 66575056 is about 405.2943163717.

The spelling of 66575056 in words is "sixty-six million, five hundred seventy-five thousand, fifty-six".