7664082221 has 8 divisors (see below), whose sum is σ = 7780677120. Its totient is φ = 7547977008.

The previous prime is 7664082199. The next prime is 7664082233. The reversal of 7664082221 is 1222804667.

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 7664082221 - 2¹⁸ = 7663820077 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 (7664022221) 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, 90821 + ... + 153546.

It is an arithmetic number, because the mean of its divisors is an integer number (972584640).

Almost surely, 2^7664082221 is an apocalyptic number.

It is an amenable number.

7664082221 is a deficient number, since it is larger than the sum of its proper divisors (116594899).

7664082221 is a wasteful number, since it uses less digits than its factorization.

7664082221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244843.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 7664082221 is about 87544.7441083701. The cubic root of 7664082221 is about 1971.6056396211.

Adding to 7664082221 its reverse (1222804667), we get a palindrome (8886886888).

The spelling of 7664082221 in words is "seven billion, six hundred sixty-four million, eighty-two thousand, two hundred twenty-one".