6691240000 has 105 divisors (see below), whose sum is σ = 16632767217. Its totient is φ = 2669952000.

The previous prime is 6691239953. The next prime is 6691240009. The reversal of 6691240000 is 421966.

The square root of 6691240000 is 81800.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 2019244096 + 4671995904 = 44936^2 + 68352^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6691240009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 16359796 + ... + 16360204.

Almost surely, 2^6691240000 is an apocalyptic number.

6691240000 is the 81800-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6691240000

6691240000 is an abundant number, since it is smaller than the sum of its proper divisors (9941527217).

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

6691240000 is an frugal number, since it uses more digits than its factorization.

6691240000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850 (or 416 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The cubic root of 6691240000 is about 1884.3816615507.

Adding to 6691240000 its reverse (421966), we get a palindrome (6691661966).

The spelling of 6691240000 in words is "six billion, six hundred ninety-one million, two hundred forty thousand".