6758648521 has 9 divisors (see below), whose sum is σ = 6807252711. Its totient is φ = 6710390664.

The previous prime is 6758648513. The next prime is 6758648557. The reversal of 6758648521 is 1258468576.

It is a happy number.

The square root of 6758648521 is 82211.

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

6758648521 is digitally balanced in base 3, 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 only one way, i.e., 6294676921 + 463971600 = 79339^2 + 21540^2 .

It is not a de Polignac number, because 6758648521 - 2³ = 6758648513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6758618521) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 18826140 + ... + 18826498.

Almost surely, 2^6758648521 is an apocalyptic number.

6758648521 is the 82211-st square number.

6758648521 is the 41106-th centered octagonal number.

It is an amenable number.

6758648521 is a deficient number, since it is larger than the sum of its proper divisors (48604190).

6758648521 is an frugal number, since it uses more digits than its factorization.

6758648521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176 (or 588 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 52.

The cubic root of 6758648521 is about 1890.6883750815.

The spelling of 6758648521 in words is "six billion, seven hundred fifty-eight million, six hundred forty-eight thousand, five hundred twenty-one".