20166666666670 has 32 divisors (see below), whose sum is σ = 36309144836160. Its totient is φ = 8064634805760.

The previous prime is 20166666666661. The next prime is 20166666666673. The reversal of 20166666666670 is 7666666666102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20166666666673) 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, 961084999 + ... + 961105981.

It is an arithmetic number, because the mean of its divisors is an integer number (1134660776130).

Almost surely, 2^{20166666666670} is an apocalyptic number.

20166666666670 is a deficient number, since it is larger than the sum of its proper divisors (16142478169490).

20166666666670 is a wasteful number, since it uses less digits than its factorization.

20166666666670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40620.

The product of its (nonzero) digits is 141087744, while the sum is 64.

The spelling of 20166666666670 in words is "twenty trillion, one hundred sixty-six billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred seventy".