166896617 has 2 divisors, whose sum is σ = 166896618. Its totient is φ = 166896616.

The previous prime is 166896581. The next prime is 166896641. The reversal of 166896617 is 716698661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138391696 + 28504921 = 11764^2 + 5339^2 .

It is a cyclic number.

It is not a de Polignac number, because 166896617 - 2¹² = 166892521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166896017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83448308 + 83448309.

It is an arithmetic number, because the mean of its divisors is an integer number (83448309).

Almost surely, 2^166896617 is an apocalyptic number.

It is an amenable number.

166896617 is a deficient number, since it is larger than the sum of its proper divisors (1).

166896617 is an equidigital number, since it uses as much as digits as its factorization.

166896617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 50.

The square root of 166896617 is about 12918.8473557048. The cubic root of 166896617 is about 550.5741849311.

The spelling of 166896617 in words is "one hundred sixty-six million, eight hundred ninety-six thousand, six hundred seventeen".