6507682221 has 32 divisors (see below), whose sum is σ = 9078106752. Its totient is φ = 4142960640.

The previous prime is 6507682213. The next prime is 6507682231. The reversal of 6507682221 is 1222867056.

It is not a de Polignac number, because 6507682221 - 2³ = 6507682213 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6507682221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6507682231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2138461 + ... + 2141501.

It is an arithmetic number, because the mean of its divisors is an integer number (283690836).

Almost surely, 2^6507682221 is an apocalyptic number.

It is an amenable number.

6507682221 is a deficient number, since it is larger than the sum of its proper divisors (2570424531).

6507682221 is a wasteful number, since it uses less digits than its factorization.

6507682221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3453.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 6507682221 is about 80670.2065263254. The cubic root of 6507682221 is about 1866.9905190907.

The spelling of 6507682221 in words is "six billion, five hundred seven million, six hundred eighty-two thousand, two hundred twenty-one".