166293789220 has 48 divisors (see below), whose sum is σ = 376202211840. Its totient is φ = 61380798336.

The previous prime is 166293789203. The next prime is 166293789247. The reversal of 166293789220 is 22987392661.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 708409 + ... + 913471.

It is an arithmetic number, because the mean of its divisors is an integer number (7837546080).

Almost surely, 2^166293789220 is an apocalyptic number.

166293789220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166293789220 is an abundant number, since it is smaller than the sum of its proper divisors (209908422620).

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

166293789220 is a wasteful number, since it uses less digits than its factorization.

166293789220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208204 (or 208202 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 55.

The spelling of 166293789220 in words is "one hundred sixty-six billion, two hundred ninety-three million, seven hundred eighty-nine thousand, two hundred twenty".