1000660000 has 60 divisors (see below), whose sum is σ = 2461822902. Its totient is φ = 400256000.

The previous prime is 1000659997. The next prime is 1000660039. The reversal of 1000660000 is 660001.

It can be written as a sum of positive squares in 5 ways, for example, as 36433296 + 964226704 = 6036^2 + 31052^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5017 + ... + 45016.

Almost surely, 2^1000660000 is an apocalyptic number.

1000660000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000660000 is an abundant number, since it is smaller than the sum of its proper divisors (1461162902).

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

1000660000 is an frugal number, since it uses more digits than its factorization.

1000660000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50063 (or 50040 counting only the distinct ones).

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

The square root of 1000660000 is about 31633.2103966701. The cubic root of 1000660000 is about 1000.2199516177.

Subtracting from 1000660000 its reverse (660001), we obtain a palindrome (999999999).

The spelling of 1000660000 in words is "one billion, six hundred sixty thousand".