1660066 has 8 divisors (see below), whose sum is σ = 2537244. Its totient is φ = 814320.

The previous prime is 1660063. The next prime is 1660069. The reversal of 1660066 is 6600661.

It is an interprime number because it is at equal distance from previous prime (1660063) and next prime (1660069).

It can be written as a sum of positive squares in 2 ways, for example, as 1334025 + 326041 = 1155^2 + 571^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 1660066.

It is not an unprimeable number, because it can be changed into a prime (1660063) 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, 7725 + ... + 7936.

2^1660066 is an apocalyptic number.

1660066 is a deficient number, since it is larger than the sum of its proper divisors (877178).

1660066 is a wasteful number, since it uses less digits than its factorization.

1660066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15716.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 1660066 is about 1288.4354853853. The cubic root of 1660066 is about 118.4063839539.

The spelling of 1660066 in words is "one million, six hundred sixty thousand, sixty-six".