166625077 has 2 divisors, whose sum is σ = 166625078. Its totient is φ = 166625076.

The previous prime is 166625071. The next prime is 166625083. The reversal of 166625077 is 770526661.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (166625071) and next prime (166625083).

It can be written as a sum of positive squares in only one way, i.e., 166048996 + 576081 = 12886^2 + 759^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166625077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166625071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83312538 + 83312539.

It is an arithmetic number, because the mean of its divisors is an integer number (83312539).

Almost surely, 2^166625077 is an apocalyptic number.

It is an amenable number.

166625077 is a deficient number, since it is larger than the sum of its proper divisors (1).

166625077 is an equidigital number, since it uses as much as digits as its factorization.

166625077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 166625077 is about 12908.3336259953. Note that the first 3 decimals coincide. The cubic root of 166625077 is about 550.2754289898.

The spelling of 166625077 in words is "one hundred sixty-six million, six hundred twenty-five thousand, seventy-seven".