1000660 has 12 divisors (see below), whose sum is σ = 2101428. Its totient is φ = 400256.

The previous prime is 1000651. The next prime is 1000667. The reversal of 1000660 is 660001.

1000660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 161604 + 839056 = 402^2 + 916^2 .

1000660 is a modest number, since divided by 660 gives 100 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 1000660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000667) 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, 24997 + ... + 25036.

It is an arithmetic number, because the mean of its divisors is an integer number (175119).

2^1000660 is an apocalyptic number.

1000660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000660 is an abundant number, since it is smaller than the sum of its proper divisors (1100768).

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

1000660 is a wasteful number, since it uses less digits than its factorization.

1000660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50042 (or 50040 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1000660 is about 1000.3299455680. The cubic root of 1000660 is about 100.0219951618.

Adding to 1000660 its reverse (660001), we get a palindrome (1660661).

The spelling of 1000660 in words is "one million, six hundred sixty", and thus it is an aban number.