20664606168 has 64 divisors (see below), whose sum is σ = 57787020000. Its totient is φ = 6841961856.

The previous prime is 20664606167. The next prime is 20664606199. The reversal of 20664606168 is 86160646602.

20664606168 is a `hidden beast` number, since 20 + 6 + 6 + 4 + 6 + 0 + 616 + 8 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20664606167) 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, 288855 + ... + 353222.

Almost surely, 2^20664606168 is an apocalyptic number.

It is an amenable number.

20664606168 is an abundant number, since it is smaller than the sum of its proper divisors (37122413832).

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

20664606168 is a wasteful number, since it uses less digits than its factorization.

20664606168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642241 (or 642231 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 20664606168 in words is "twenty billion, six hundred sixty-four million, six hundred six thousand, one hundred sixty-eight".