1720066 has 8 divisors (see below), whose sum is σ = 2663424. Its totient is φ = 832260.

The previous prime is 1720063. The next prime is 1720109. The reversal of 1720066 is 6600271.

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

It is not an unprimeable number, because it can be changed into a prime (1720063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13810 + ... + 13933.

It is an arithmetic number, because the mean of its divisors is an integer number (332928).

2^1720066 is an apocalyptic number.

1720066 is a deficient number, since it is larger than the sum of its proper divisors (943358).

1720066 is a wasteful number, since it uses less digits than its factorization.

1720066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27776.

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

The square root of 1720066 is about 1311.5128668831. The cubic root of 1720066 is about 119.8160607897.

The spelling of 1720066 in words is "one million, seven hundred twenty thousand, sixty-six".