166272991141 has 2 divisors, whose sum is σ = 166272991142. Its totient is φ = 166272991140.

The previous prime is 166272991103. The next prime is 166272991163. The reversal of 166272991141 is 141199272661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165916914241 + 356076900 = 407329^2 + 18870^2 .

It is a cyclic number.

It is not a de Polignac number, because 166272991141 - 2⁷ = 166272991013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166272992141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83136495570 + 83136495571.

It is an arithmetic number, because the mean of its divisors is an integer number (83136495571).

Almost surely, 2^166272991141 is an apocalyptic number.

It is an amenable number.

166272991141 is a deficient number, since it is larger than the sum of its proper divisors (1).

166272991141 is an equidigital number, since it uses as much as digits as its factorization.

166272991141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 49.

The spelling of 166272991141 in words is "one hundred sixty-six billion, two hundred seventy-two million, nine hundred ninety-one thousand, one hundred forty-one".