166661022236 has 12 divisors (see below), whose sum is σ = 294332540040. Its totient is φ = 82566010800.

The previous prime is 166661022191. The next prime is 166661022263. The reversal of 166661022236 is 632220166661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 166661022193 and 166661022202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191124590 + ... + 191125461.

It is an arithmetic number, because the mean of its divisors is an integer number (24527711670).

Almost surely, 2^166661022236 is an apocalyptic number.

It is an amenable number.

166661022236 is a deficient number, since it is larger than the sum of its proper divisors (127671517804).

166661022236 is a wasteful number, since it uses less digits than its factorization.

166661022236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382250164 (or 382250162 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 41.

Adding to 166661022236 its reverse (632220166661), we get a palindrome (798881188897).

The spelling of 166661022236 in words is "one hundred sixty-six billion, six hundred sixty-one million, twenty-two thousand, two hundred thirty-six".