20166866118 has 48 divisors (see below), whose sum is σ = 52108183296. Its totient is φ = 5511440880.

The previous prime is 20166866101. The next prime is 20166866119. The reversal of 20166866118 is 81166866102.

20166866118 is a `hidden beast` number, since 20 + 1 + 6 + 6 + 8 + 6 + 611 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20166866119) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3476548 + ... + 3482343.

It is an arithmetic number, because the mean of its divisors is an integer number (1085587152).

Almost surely, 2^20166866118 is an apocalyptic number.

20166866118 is an abundant number, since it is smaller than the sum of its proper divisors (31941317178).

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

20166866118 is a wasteful number, since it uses less digits than its factorization.

20166866118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6958929 (or 6958926 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 20166866118 in words is "twenty billion, one hundred sixty-six million, eight hundred sixty-six thousand, one hundred eighteen".