1000800660 has 48 divisors (see below), whose sum is σ = 2805163200. Its totient is φ = 266601984.

The previous prime is 1000800631. The next prime is 1000800673. The reversal of 1000800660 is 660080001.

It is a super-2 number, since 2×1000800660² = 2003203922112871200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52956 + ... + 69324.

It is an arithmetic number, because the mean of its divisors is an integer number (58440900).

Almost surely, 2^1000800660 is an apocalyptic number.

1000800660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000800660 is an abundant number, since it is smaller than the sum of its proper divisors (1804362540).

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

1000800660 is a wasteful number, since it uses less digits than its factorization.

1000800660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17400 (or 17398 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1000800660 is about 31635.4336148566. The cubic root of 1000800660 is about 1000.2668154698.

Adding to 1000800660 its reverse (660080001), we get a palindrome (1660880661).

The spelling of 1000800660 in words is "one billion, eight hundred thousand, six hundred sixty".