666066056 has 8 divisors (see below), whose sum is σ = 1248873870. Its totient is φ = 333033024.

The previous prime is 666066053. The next prime is 666066073. The reversal of 666066056 is 650660666.

666066056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 618317956 + 47748100 = 24866^2 + 6910^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (666066053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41629121 + ... + 41629136.

Almost surely, 2^666066056 is an apocalyptic number.

It is an amenable number.

666066056 is a deficient number, since it is larger than the sum of its proper divisors (582807814).

666066056 is a wasteful number, since it uses less digits than its factorization.

666066056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83258263 (or 83258259 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 41.

The square root of 666066056 is about 25808.2555783997. The cubic root of 666066056 is about 873.3180450418.

The spelling of 666066056 in words is "six hundred sixty-six million, sixty-six thousand, fifty-six".