166598 has 4 divisors (see below), whose sum is σ = 249900. Its totient is φ = 83298.

The previous prime is 166597. The next prime is 166601. The reversal of 166598 is 895661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 895661 = 13 ⋅68897.

It is a Curzon number.

It is a plaindrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 166598.

It is not an unprimeable number, because it can be changed into a prime (166597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41648 + ... + 41651.

It is an arithmetic number, because the mean of its divisors is an integer number (62475).

2¹⁶⁶⁵⁹⁸ is an apocalyptic number.

166598 is a deficient number, since it is larger than the sum of its proper divisors (83302).

166598 is an equidigital number, since it uses as much as digits as its factorization.

166598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83301.

The product of its digits is 12960, while the sum is 35.

The square root of 166598 is about 408.1641826520. The cubic root of 166598 is about 55.0245620322.

The spelling of 166598 in words is "one hundred sixty-six thousand, five hundred ninety-eight".