166706593 has 2 divisors, whose sum is σ = 166706594. Its totient is φ = 166706592.

The previous prime is 166706591. The next prime is 166706597. The reversal of 166706593 is 395607661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117874449 + 48832144 = 10857^2 + 6988^2 .

It is a cyclic number.

It is not a de Polignac number, because 166706593 - 2¹ = 166706591 is a prime.

Together with 166706591, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (166706591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83353296 + 83353297.

It is an arithmetic number, because the mean of its divisors is an integer number (83353297).

Almost surely, 2^166706593 is an apocalyptic number.

It is an amenable number.

166706593 is a deficient number, since it is larger than the sum of its proper divisors (1).

166706593 is an equidigital number, since it uses as much as digits as its factorization.

166706593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 166706593 is about 12911.4907350004. The cubic root of 166706593 is about 550.3651492565.

The spelling of 166706593 in words is "one hundred sixty-six million, seven hundred six thousand, five hundred ninety-three".