720166 has 8 divisors (see below), whose sum is σ = 1098144. Its totient is φ = 354120.

The previous prime is 720151. The next prime is 720173. The reversal of 720166 is 661027.

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

It is a congruent number.

It is an unprimeable number.

720166 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, 2830 + ... + 3073.

It is an arithmetic number, because the mean of its divisors is an integer number (137268).

2⁷²⁰¹⁶⁶ is an apocalyptic number.

720166 is a deficient number, since it is larger than the sum of its proper divisors (377978).

720166 is a wasteful number, since it uses less digits than its factorization.

720166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5966.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 720166 is about 848.6259482245. The cubic root of 720166 is about 89.6349824869.

The spelling of 720166 in words is "seven hundred twenty thousand, one hundred sixty-six".