1980066 has 32 divisors (see below), whose sum is σ = 4550400. Its totient is φ = 568080.

The previous prime is 1980053. The next prime is 1980067. The reversal of 1980066 is 6600891.

It is a super-2 number, since 2×1980066² = 7841322728712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1980067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 465 + ... + 2043.

It is an arithmetic number, because the mean of its divisors is an integer number (142200).

2^1980066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1980066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2275200).

1980066 is an abundant number, since it is smaller than the sum of its proper divisors (2570334).

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

1980066 is a wasteful number, since it uses less digits than its factorization.

1980066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 1980066 is about 1407.1481798304. The cubic root of 1980066 is about 125.5721187791.

The spelling of 1980066 in words is "one million, nine hundred eighty thousand, sixty-six".