166698 has 48 divisors (see below), whose sum is σ = 436800. Its totient is φ = 47628.

The previous prime is 166693. The next prime is 166703. The reversal of 166698 is 896661.

It is an interprime number because it is at equal distance from previous prime (166693) and next prime (166703).

It is an Ulam number.

Its product of digits (15552) is a multiple of the sum of its prime divisors (12).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166693) by changing a digit.

166698 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23811 + ... + 23817.

It is an arithmetic number, because the mean of its divisors is an integer number (9100).

2¹⁶⁶⁶⁹⁸ is an apocalyptic number.

166698 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 166698, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218400).

166698 is an abundant number, since it is smaller than the sum of its proper divisors (270102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166698 is an frugal number, since it uses more digits than its factorization.

166698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38 (or 12 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 166698 is about 408.2866639997. The cubic root of 166698 is about 55.0355692784.

It can be divided in two parts, 1666 and 98, that added together give a square (1764 = 42²).

The spelling of 166698 in words is "one hundred sixty-six thousand, six hundred ninety-eight".