6681352523 has 4 divisors (see below), whose sum is σ = 6688484040. Its totient is φ = 6674221008.

The previous prime is 6681352519. The next prime is 6681352537. The reversal of 6681352523 is 3252531866.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6681352523 - 2² = 6681352519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6681352583) 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, 3564353 + ... + 3566226.

It is an arithmetic number, because the mean of its divisors is an integer number (1672121010).

Almost surely, 2^6681352523 is an apocalyptic number.

6681352523 is a deficient number, since it is larger than the sum of its proper divisors (7131517).

6681352523 is an equidigital number, since it uses as much as digits as its factorization.

6681352523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7131516.

The product of its digits is 259200, while the sum is 41.

The square root of 6681352523 is about 81739.5407559891. The cubic root of 6681352523 is about 1883.4530362078.

The spelling of 6681352523 in words is "six billion, six hundred eighty-one million, three hundred fifty-two thousand, five hundred twenty-three".