166017222222 has 96 divisors (see below), whose sum is σ = 360512770464. Its totient is φ = 50928998400.

The previous prime is 166017222209. The next prime is 166017222289. The reversal of 166017222222 is 222222710661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21398368 + ... + 21406124.

It is an arithmetic number, because the mean of its divisors is an integer number (3755341359).

Almost surely, 2^166017222222 is an apocalyptic number.

166017222222 is an abundant number, since it is smaller than the sum of its proper divisors (194495548242).

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

166017222222 is a wasteful number, since it uses less digits than its factorization.

166017222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8082 (or 8063 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

Adding to 166017222222 its reverse (222222710661), we get a palindrome (388239932883).

The spelling of 166017222222 in words is "one hundred sixty-six billion, seventeen million, two hundred twenty-two thousand, two hundred twenty-two".