7664284221 has 16 divisors (see below), whose sum is σ = 11150929920. Its totient is φ = 4643820720.

The previous prime is 7664284211. The next prime is 7664284223. The reversal of 7664284221 is 1224824667.

It is a happy number.

It is not a de Polignac number, because 7664284221 - 2⁵ = 7664284189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7664284223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109326 + ... + 165168.

It is an arithmetic number, because the mean of its divisors is an integer number (696933120).

Almost surely, 2^7664284221 is an apocalyptic number.

It is an amenable number.

7664284221 is a deficient number, since it is larger than the sum of its proper divisors (3486645699).

7664284221 is a wasteful number, since it uses less digits than its factorization.

7664284221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60016.

The product of its digits is 258048, while the sum is 42.

The square root of 7664284221 is about 87545.8977965273. The cubic root of 7664284221 is about 1971.6229611489.

The spelling of 7664284221 in words is "seven billion, six hundred sixty-four million, two hundred eighty-four thousand, two hundred twenty-one".