660911812 has 12 divisors (see below), whose sum is σ = 1261740816. Its totient is φ = 300414440.

The previous prime is 660911809. The next prime is 660911833. The reversal of 660911812 is 218119066.

660911812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×660911812² = 873608846482246688, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7510318 + ... + 7510405.

It is an arithmetic number, because the mean of its divisors is an integer number (105145068).

Almost surely, 2^660911812 is an apocalyptic number.

It is an amenable number.

660911812 is a deficient number, since it is larger than the sum of its proper divisors (600829004).

660911812 is a wasteful number, since it uses less digits than its factorization.

660911812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15020738 (or 15020736 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 660911812 is about 25708.2051493293. The cubic root of 660911812 is about 871.0595326551.

The spelling of 660911812 in words is "six hundred sixty million, nine hundred eleven thousand, eight hundred twelve".