166420423304211 has 8 divisors (see below), whose sum is σ = 222009890374800. Its totient is φ = 110888952551552.

The previous prime is 166420423304029. The next prime is 166420423304221. The reversal of 166420423304211 is 112403324024661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166420423304211 - 2⁹ = 166420423303699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166420423304211.

It is not an unprimeable number, because it can be changed into a prime (166420423304221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14499072786 + ... + 14499084263.

It is an arithmetic number, because the mean of its divisors is an integer number (27751236296850).

Almost surely, 2^{166420423304211} is an apocalyptic number.

166420423304211 is a deficient number, since it is larger than the sum of its proper divisors (55589467070589).

166420423304211 is a wasteful number, since it uses less digits than its factorization.

166420423304211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28998158965.

The product of its (nonzero) digits is 165888, while the sum is 39.

Adding to 166420423304211 its reverse (112403324024661), we get a palindrome (278823747328872).

The spelling of 166420423304211 in words is "one hundred sixty-six trillion, four hundred twenty billion, four hundred twenty-three million, three hundred four thousand, two hundred eleven".