660070666 has 8 divisors (see below), whose sum is σ = 990271584. Its totient is φ = 329980140.

The previous prime is 660070661. The next prime is 660070669. The reversal of 660070666 is 666070066.

660070666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×660070666² = 871386568227367112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (660070661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10540 + ... + 37831.

It is an arithmetic number, because the mean of its divisors is an integer number (123783948).

Almost surely, 2^660070666 is an apocalyptic number.

660070666 is a deficient number, since it is larger than the sum of its proper divisors (330200918).

660070666 is a wasteful number, since it uses less digits than its factorization.

660070666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55196.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 660070666 is about 25691.8404556778. The cubic root of 660070666 is about 870.6898417319.

The spelling of 660070666 in words is "six hundred sixty million, seventy thousand, six hundred sixty-six".