660864082 has 4 divisors (see below), whose sum is σ = 991296126. Its totient is φ = 330432040.

The previous prime is 660864047. The next prime is 660864089. The reversal of 660864082 is 280468066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 448550041 + 212314041 = 21179^2 + 14571^2 .

It is not an unprimeable number, because it can be changed into a prime (660864089) 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, 165216019 + ... + 165216022.

Almost surely, 2^660864082 is an apocalyptic number.

660864082 is a deficient number, since it is larger than the sum of its proper divisors (330432044).

660864082 is a wasteful number, since it uses less digits than its factorization.

660864082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330432043.

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 660864082 is about 25707.2768297227. The cubic root of 660864082 is about 871.0385633056.

The spelling of 660864082 in words is "six hundred sixty million, eight hundred sixty-four thousand, eighty-two".