664066066 has 16 divisors (see below), whose sum is σ = 1028977920. Its totient is φ = 321089040.

The previous prime is 664066057. The next prime is 664066129. The reversal of 664066066 is 660660466.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107925 + ... + 113911.

It is an arithmetic number, because the mean of its divisors is an integer number (64311120).

Almost surely, 2^664066066 is an apocalyptic number.

664066066 is a deficient number, since it is larger than the sum of its proper divisors (364911854).

664066066 is a wasteful number, since it uses less digits than its factorization.

664066066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7809.

The product of its (nonzero) digits is 186624, while the sum is 40.

The square root of 664066066 is about 25769.4793505806. The cubic root of 664066066 is about 872.4430675243.

The spelling of 664066066 in words is "six hundred sixty-four million, sixty-six thousand, sixty-six".