52066681 has 2 divisors, whose sum is σ = 52066682. Its totient is φ = 52066680.

The previous prime is 52066667. The next prime is 52066711. The reversal of 52066681 is 18666025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49843600 + 2223081 = 7060^2 + 1491^2 .

It is a cyclic number.

It is not a de Polignac number, because 52066681 - 2⁵ = 52066649 is a prime.

It is a super-2 number, since 2×52066681² = 5421878540711522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (52066621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26033340 + 26033341.

It is an arithmetic number, because the mean of its divisors is an integer number (26033341).

Almost surely, 2^52066681 is an apocalyptic number.

It is an amenable number.

52066681 is a deficient number, since it is larger than the sum of its proper divisors (1).

52066681 is an equidigital number, since it uses as much as digits as its factorization.

52066681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 52066681 is about 7215.7245651424. The cubic root of 52066681 is about 373.4105908529.

The spelling of 52066681 in words is "fifty-two million, sixty-six thousand, six hundred eighty-one".