4668581 has 2 divisors, whose sum is σ = 4668582. Its totient is φ = 4668580.

The previous prime is 4668577. The next prime is 4668583. The reversal of 4668581 is 1858664.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2592100 + 2076481 = 1610^2 + 1441^2 .

It is a cyclic number.

It is not a de Polignac number, because 4668581 - 2² = 4668577 is a prime.

It is a super-2 number, since 2×4668581² = 43591297107122, which contains 22 as substring.

Together with 4668583, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4668583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2334290 + 2334291.

It is an arithmetic number, because the mean of its divisors is an integer number (2334291).

Almost surely, 2^4668581 is an apocalyptic number.

It is an amenable number.

4668581 is a deficient number, since it is larger than the sum of its proper divisors (1).

4668581 is an equidigital number, since it uses as much as digits as its factorization.

4668581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 38.

The square root of 4668581 is about 2160.6899361084. The cubic root of 4668581 is about 167.1327783354.

The spelling of 4668581 in words is "four million, six hundred sixty-eight thousand, five hundred eighty-one".