6721712523 has 12 divisors (see below), whose sum is σ = 9732207888. Its totient is φ = 4470495120.

The previous prime is 6721712471. The next prime is 6721712561. The reversal of 6721712523 is 3252171276.

6721712523 is a `hidden beast` number, since 67 + 2 + 1 + 71 + 2 + 523 = 666.

It is not a de Polignac number, because 6721712523 - 2⁸ = 6721712267 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (6721712563) 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, 883215 + ... + 890792.

It is an arithmetic number, because the mean of its divisors is an integer number (811017324).

Almost surely, 2^6721712523 is an apocalyptic number.

6721712523 is a deficient number, since it is larger than the sum of its proper divisors (3010495365).

6721712523 is a wasteful number, since it uses less digits than its factorization.

6721712523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774434 (or 1774431 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 6721712523 is about 81986.0507830448. The cubic root of 6721712523 is about 1887.2378792942.

Adding to 6721712523 its reverse (3252171276), we get a palindrome (9973883799).

The spelling of 6721712523 in words is "six billion, seven hundred twenty-one million, seven hundred twelve thousand, five hundred twenty-three".