166616077 has 2 divisors, whose sum is σ = 166616078. Its totient is φ = 166616076.

The previous prime is 166616063. The next prime is 166616083. The reversal of 166616077 is 770616661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102839881 + 63776196 = 10141^2 + 7986^2 .

It is a cyclic number.

It is not a de Polignac number, because 166616077 - 2¹¹ = 166614029 is a prime.

It is a super-2 number, since 2×166616077² = 55521834229739858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166616017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83308038 + 83308039.

It is an arithmetic number, because the mean of its divisors is an integer number (83308039).

Almost surely, 2^166616077 is an apocalyptic number.

It is an amenable number.

166616077 is a deficient number, since it is larger than the sum of its proper divisors (1).

166616077 is an equidigital number, since it uses as much as digits as its factorization.

166616077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 166616077 is about 12907.9850092879. The cubic root of 166616077 is about 550.2655213814.

The spelling of 166616077 in words is "one hundred sixty-six million, six hundred sixteen thousand, seventy-seven".