166898 has 4 divisors (see below), whose sum is σ = 250350. Its totient is φ = 83448.

The previous prime is 166871. The next prime is 166909. The reversal of 166898 is 898661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 162409 + 4489 = 403^2 + 67^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41723 + ... + 41726.

2¹⁶⁶⁸⁹⁸ is an apocalyptic number.

166898 is a deficient number, since it is larger than the sum of its proper divisors (83452).

166898 is an equidigital number, since it uses as much as digits as its factorization.

166898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83451.

The product of its digits is 20736, while the sum is 38.

The square root of 166898 is about 408.5315165321. The cubic root of 166898 is about 55.0575705717.

The spelling of 166898 in words is "one hundred sixty-six thousand, eight hundred ninety-eight".