7668454221 has 48 divisors (see below), whose sum is σ = 11782540800. Its totient is φ = 4929059520.

The previous prime is 7668454217. The next prime is 7668454237. The reversal of 7668454221 is 1224548667.

7668454221 is a `hidden beast` number, since 7 + 6 + 6 + 84 + 542 + 21 = 666.

It is not a de Polignac number, because 7668454221 - 2² = 7668454217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7668454121) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12428305 + ... + 12428921.

It is an arithmetic number, because the mean of its divisors is an integer number (245469600).

Almost surely, 2^7668454221 is an apocalyptic number.

It is an amenable number.

7668454221 is a deficient number, since it is larger than the sum of its proper divisors (4114086579).

7668454221 is a wasteful number, since it uses less digits than its factorization.

7668454221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167 (or 1130 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 7668454221 is about 87569.7106367264. The cubic root of 7668454221 is about 1971.9804712513.

The spelling of 7668454221 in words is "seven billion, six hundred sixty-eight million, four hundred fifty-four thousand, two hundred twenty-one".