1680066 has 12 divisors (see below), whose sum is σ = 3640182. Its totient is φ = 560016.

The previous prime is 1680023. The next prime is 1680071. The reversal of 1680066 is 6600861.

It can be written as a sum of positive squares in only one way, i.e., 1490841 + 189225 = 1221^2 + 435^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46651 + ... + 46686.

2^1680066 is an apocalyptic number.

1680066 is an abundant number, since it is smaller than the sum of its proper divisors (1960116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1680066 is a wasteful number, since it uses less digits than its factorization.

1680066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93345 (or 93342 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1680066 is about 1296.1735994843. The cubic root of 1680066 is about 118.8799957763.

The spelling of 1680066 in words is "one million, six hundred eighty thousand, sixty-six".