166625071 has 2 divisors, whose sum is σ = 166625072. Its totient is φ = 166625070.

The previous prime is 166625051. The next prime is 166625077. The reversal of 166625071 is 170526661.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (170526661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166625071 - 2⁹ = 166624559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166625077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83312535 + 83312536.

It is an arithmetic number, because the mean of its divisors is an integer number (83312536).

Almost surely, 2^166625071 is an apocalyptic number.

166625071 is a deficient number, since it is larger than the sum of its proper divisors (1).

166625071 is an equidigital number, since it uses as much as digits as its factorization.

166625071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 166625071 is about 12908.3333935873. Note that the first 4 decimals coincide. The cubic root of 166625071 is about 550.2754223848.

The spelling of 166625071 in words is "one hundred sixty-six million, six hundred twenty-five thousand, seventy-one".