6712637221 has 8 divisors (see below), whose sum is σ = 7352584920. Its totient is φ = 6099921408.

The previous prime is 6712637159. The next prime is 6712637233. The reversal of 6712637221 is 1227362176.

It is a happy number.

6712637221 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 4 ways, for example, as 1425893121 + 5286744100 = 37761^2 + 72710^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6712637221 - 2⁷ = 6712637093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6712637021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6807456 + ... + 6808441.

It is an arithmetic number, because the mean of its divisors is an integer number (919073115).

Almost surely, 2^6712637221 is an apocalyptic number.

It is an amenable number.

6712637221 is a deficient number, since it is larger than the sum of its proper divisors (639947699).

6712637221 is a wasteful number, since it uses less digits than its factorization.

6712637221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13615943.

The product of its digits is 42336, while the sum is 37.

The square root of 6712637221 is about 81930.6854664356. The cubic root of 6712637221 is about 1886.3881470505.

Adding to 6712637221 its reverse (1227362176), we get a palindrome (7939999397).

The spelling of 6712637221 in words is "six billion, seven hundred twelve million, six hundred thirty-seven thousand, two hundred twenty-one".