170666489 has 8 divisors (see below), whose sum is σ = 197239680. Its totient is φ = 144641376.

The previous prime is 170666443. The next prime is 170666497. The reversal of 170666489 is 984666071.

It is a happy number.

170666489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 170666489 - 2¹⁶ = 170600953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (170665489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136349 + ... + 137594.

It is an arithmetic number, because the mean of its divisors is an integer number (24654960).

Almost surely, 2^170666489 is an apocalyptic number.

It is an amenable number.

170666489 is a deficient number, since it is larger than the sum of its proper divisors (26573191).

170666489 is an equidigital number, since it uses as much as digits as its factorization.

170666489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274039.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 170666489 is about 13063.9384949563. The cubic root of 170666489 is about 554.6888270005.

The spelling of 170666489 in words is "one hundred seventy million, six hundred sixty-six thousand, four hundred eighty-nine".