166412468121 has 24 divisors (see below), whose sum is σ = 235760291424. Its totient is φ = 104390292480.

The previous prime is 166412468111. The next prime is 166412468137. The reversal of 166412468121 is 121864214661.

It is not a de Polignac number, because 166412468121 - 2¹⁰ = 166412467097 is a prime.

It is a super-2 number, since 2×166412468121² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166412468111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3933346 + ... + 3975428.

It is an arithmetic number, because the mean of its divisors is an integer number (9823345476).

Almost surely, 2^166412468121 is an apocalyptic number.

It is an amenable number.

166412468121 is a deficient number, since it is larger than the sum of its proper divisors (69347823303).

166412468121 is a wasteful number, since it uses less digits than its factorization.

166412468121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46681 (or 46664 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The spelling of 166412468121 in words is "one hundred sixty-six billion, four hundred twelve million, four hundred sixty-eight thousand, one hundred twenty-one".