660166077052218 has 32 divisors (see below), whose sum is σ = 1440381608911872. Its totient is φ = 200047651521200.

The previous prime is 660166077052217. The next prime is 660166077052253. The reversal of 660166077052218 is 812250770661066.

660166077052218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (660166077052217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61895196 + ... + 71772887.

It is an arithmetic number, because the mean of its divisors is an integer number (45011925278496).

Almost surely, 2^{660166077052218} is an apocalyptic number.

660166077052218 is an abundant number, since it is smaller than the sum of its proper divisors (780215531859654).

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

660166077052218 is a wasteful number, since it uses less digits than its factorization.

660166077052218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133742930.

The product of its (nonzero) digits is 10160640, while the sum is 57.

The spelling of 660166077052218 in words is "six hundred sixty trillion, one hundred sixty-six billion, seventy-seven million, fifty-two thousand, two hundred eighteen".