166159577 has 2 divisors, whose sum is σ = 166159578. Its totient is φ = 166159576.

The previous prime is 166159549. The next prime is 166159583. The reversal of 166159577 is 775951661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93296281 + 72863296 = 9659^2 + 8536^2 .

It is an emirp because it is prime and its reverse (775951661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166159577 - 2¹⁶ = 166094041 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166159507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83079788 + 83079789.

It is an arithmetic number, because the mean of its divisors is an integer number (83079789).

Almost surely, 2^166159577 is an apocalyptic number.

It is an amenable number.

166159577 is a deficient number, since it is larger than the sum of its proper divisors (1).

166159577 is an equidigital number, since it uses as much as digits as its factorization.

166159577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 396900, while the sum is 47.

The square root of 166159577 is about 12890.2900277690. The cubic root of 166159577 is about 549.7625167562.

The spelling of 166159577 in words is "one hundred sixty-six million, one hundred fifty-nine thousand, five hundred seventy-seven".