166000076161921 has 2 divisors, whose sum is σ = 166000076161922. Its totient is φ = 166000076161920.

The previous prime is 166000076161897. The next prime is 166000076161943. The reversal of 166000076161921 is 129161670000661.

166000076161921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164946784471921 + 1053291690000 = 12843161^2 + 1026300^2 .

It is a cyclic number.

It is not a de Polignac number, because 166000076161921 - 2¹⁷ = 166000076030849 is a prime.

It is not a weakly prime, because it can be changed into another prime (166000076171921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83000038080960 + 83000038080961.

It is an arithmetic number, because the mean of its divisors is an integer number (83000038080961).

Almost surely, 2^{166000076161921} is an apocalyptic number.

It is an amenable number.

166000076161921 is a deficient number, since it is larger than the sum of its proper divisors (1).

166000076161921 is an equidigital number, since it uses as much as digits as its factorization.

166000076161921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 166000076161921 in words is "one hundred sixty-six trillion, seventy-six million, one hundred sixty-one thousand, nine hundred twenty-one".