166643422204 has 24 divisors (see below), whose sum is σ = 334056584288. Its totient is φ = 71253665280.

The previous prime is 166643422139. The next prime is 166643422223. The reversal of 166643422204 is 402224346661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6860337 + ... + 6884584.

Almost surely, 2^166643422204 is an apocalyptic number.

166643422204 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

166643422204 is an abundant number, since it is smaller than the sum of its proper divisors (167413162084).

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

166643422204 is a wasteful number, since it uses less digits than its factorization.

166643422204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13745365 (or 13745363 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 40.

Adding to 166643422204 its reverse (402224346661), we get a palindrome (568867768865).

The spelling of 166643422204 in words is "one hundred sixty-six billion, six hundred forty-three million, four hundred twenty-two thousand, two hundred four".