660606066 has 24 divisors (see below), whose sum is σ = 1469998764. Its totient is φ = 214250400.

The previous prime is 660606013. The next prime is 660606071.

660606066 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 597069225 + 63536841 = 24435^2 + 7971^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 660606066.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 495285 + ... + 496616.

Almost surely, 2^660606066 is an apocalyptic number.

660606066 is an abundant number, since it is smaller than the sum of its proper divisors (809392698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660606066 is a wasteful number, since it uses less digits than its factorization.

660606066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991946 (or 991943 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 660606066 is about 25702.2579941919. The cubic root of 660606066 is about 870.9251909564.

The spelling of 660606066 in words is "six hundred sixty million, six hundred six thousand, sixty-six".