166420610052241 has 16 divisors (see below), whose sum is σ = 168505522272720. Its totient is φ = 164340527662080.

The previous prime is 166420610052239. The next prime is 166420610052251. The reversal of 166420610052241 is 142250016024661.

It can be written as a sum of positive squares in 8 ways, for example, as 8603198800641 + 157817411251600 = 2933121^2 + 12562540^2 .

It is not a de Polignac number, because 166420610052241 - 2¹ = 166420610052239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166420610052194 and 166420610052203.

It is not an unprimeable number, because it can be changed into a prime (166420610052251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 583459701 + ... + 583744861.

It is an arithmetic number, because the mean of its divisors is an integer number (10531595142045).

Almost surely, 2^{166420610052241} is an apocalyptic number.

It is an amenable number.

166420610052241 is a deficient number, since it is larger than the sum of its proper divisors (2084912220479).

166420610052241 is an equidigital number, since it uses as much as digits as its factorization.

166420610052241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293604.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 166420610052241 in words is "one hundred sixty-six trillion, four hundred twenty billion, six hundred ten million, fifty-two thousand, two hundred forty-one".