166200551941 has 2 divisors, whose sum is σ = 166200551942. Its totient is φ = 166200551940.

The previous prime is 166200551929. The next prime is 166200551983. The reversal of 166200551941 is 149155002661.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120982230625 + 45218321316 = 347825^2 + 212646^2 .

It is a cyclic number.

It is not a de Polignac number, because 166200551941 - 2¹³ = 166200543749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166200551894 and 166200551903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166200551921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83100275970 + 83100275971.

It is an arithmetic number, because the mean of its divisors is an integer number (83100275971).

Almost surely, 2^166200551941 is an apocalyptic number.

It is an amenable number.

166200551941 is a deficient number, since it is larger than the sum of its proper divisors (1).

166200551941 is an equidigital number, since it uses as much as digits as its factorization.

166200551941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 166200551941 in words is "one hundred sixty-six billion, two hundred million, five hundred fifty-one thousand, nine hundred forty-one".