166730 has 8 divisors (see below), whose sum is σ = 300132. Its totient is φ = 66688.

The previous prime is 166723. The next prime is 166739. The reversal of 166730 is 37661.

It can be written as a sum of positive squares in 2 ways, for example, as 160801 + 5929 = 401^2 + 77^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 166696 and 166705.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 166730.

It is not an unprimeable number, because it can be changed into a prime (166739) by changing a digit.

166730 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 3 ways as a sum of consecutive naturals, for example, 8327 + ... + 8346.

2¹⁶⁶⁷³⁰ is an apocalyptic number.

166730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166730 is a deficient number, since it is larger than the sum of its proper divisors (133402).

166730 is a wasteful number, since it uses less digits than its factorization.

166730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16680.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 166730 is about 408.3258502716. The cubic root of 166730 is about 55.0390906674.

Adding to 166730 its sum of digits (23), we get a triangular number (166753 = T₅₇₇).

The spelling of 166730 in words is "one hundred sixty-six thousand, seven hundred thirty".