166436057 has 2 divisors, whose sum is σ = 166436058. Its totient is φ = 166436056.

The previous prime is 166436047. The next prime is 166436077. The reversal of 166436057 is 750634661.

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., 166435801 + 256 = 12901^2 + 16^2 .

It is a cyclic number.

It is not a de Polignac number, because 166436057 - 2¹⁰ = 166435033 is a prime.

It is a super-2 number, since 2×166436057² = 55401922139414498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166436057.

It is not a weakly prime, because it can be changed into another prime (166436047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83218028 + 83218029.

It is an arithmetic number, because the mean of its divisors is an integer number (83218029).

Almost surely, 2^166436057 is an apocalyptic number.

It is an amenable number.

166436057 is a deficient number, since it is larger than the sum of its proper divisors (1).

166436057 is an equidigital number, since it uses as much as digits as its factorization.

166436057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 166436057 is about 12901.0099217077. The cubic root of 166436057 is about 550.0672722122.

The spelling of 166436057 in words is "one hundred sixty-six million, four hundred thirty-six thousand, fifty-seven".