7668481 has 2 divisors, whose sum is σ = 7668482. Its totient is φ = 7668480.

The previous prime is 7668467. The next prime is 7668527. The reversal of 7668481 is 1848667.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6250000 + 1418481 = 2500^2 + 1191^2 .

It is an emirp because it is prime and its reverse (1848667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7668481 - 2⁵ = 7668449 is a prime.

It is a super-2 number, since 2×7668481² = 117611201694722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7668421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3834240 + 3834241.

It is an arithmetic number, because the mean of its divisors is an integer number (3834241).

Almost surely, 2^7668481 is an apocalyptic number.

It is an amenable number.

7668481 is a deficient number, since it is larger than the sum of its proper divisors (1).

7668481 is an equidigital number, since it uses as much as digits as its factorization.

7668481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 40.

The square root of 7668481 is about 2769.2022316906. The cubic root of 7668481 is about 197.1982766699.

The spelling of 7668481 in words is "seven million, six hundred sixty-eight thousand, four hundred eighty-one".