165700057 has 2 divisors, whose sum is σ = 165700058. Its totient is φ = 165700056.

The previous prime is 165700033. The next prime is 165700061. The reversal of 165700057 is 750007561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124791241 + 40908816 = 11171^2 + 6396^2 .

It is an emirp because it is prime and its reverse (750007561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165700057 - 2¹¹ = 165698009 is a prime.

It is not a weakly prime, because it can be changed into another prime (165700657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82850028 + 82850029.

It is an arithmetic number, because the mean of its divisors is an integer number (82850029).

Almost surely, 2^165700057 is an apocalyptic number.

It is an amenable number.

165700057 is a deficient number, since it is larger than the sum of its proper divisors (1).

165700057 is an equidigital number, since it uses as much as digits as its factorization.

165700057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 165700057 is about 12872.4534180552. The cubic root of 165700057 is about 549.2552531616.

The spelling of 165700057 in words is "one hundred sixty-five million, seven hundred thousand, fifty-seven".