6688953531 has 12 divisors (see below), whose sum is σ = 10405039008. Its totient is φ = 4116279024.

The previous prime is 6688953521. The next prime is 6688953533. The reversal of 6688953531 is 1353598866.

It is not a de Polignac number, because 6688953531 - 2¹⁰ = 6688952507 is a prime.

It is a super-2 number, since 2×6688953531² = 89484198679754735922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6688953533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28585155 + ... + 28585388.

It is an arithmetic number, because the mean of its divisors is an integer number (867086584).

Almost surely, 2^6688953531 is an apocalyptic number.

6688953531 is a deficient number, since it is larger than the sum of its proper divisors (3716085477).

6688953531 is a wasteful number, since it uses less digits than its factorization.

6688953531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57170562 (or 57170559 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The square root of 6688953531 is about 81786.0228339782. The cubic root of 6688953531 is about 1884.1669992405.

The spelling of 6688953531 in words is "six billion, six hundred eighty-eight million, nine hundred fifty-three thousand, five hundred thirty-one".