52066661 has 2 divisors, whose sum is σ = 52066662. Its totient is φ = 52066660.

The previous prime is 52066649. The next prime is 52066667. The reversal of 52066661 is 16666025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48916036 + 3150625 = 6994^2 + 1775^2 .

It is a cyclic number.

It is not a de Polignac number, because 52066661 - 2¹⁸ = 51804517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52066667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26033330 + 26033331.

It is an arithmetic number, because the mean of its divisors is an integer number (26033331).

Almost surely, 2^52066661 is an apocalyptic number.

It is an amenable number.

52066661 is a deficient number, since it is larger than the sum of its proper divisors (1).

52066661 is an equidigital number, since it uses as much as digits as its factorization.

52066661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 52066661 is about 7215.7231792801. The cubic root of 52066661 is about 373.4105430411.

The spelling of 52066661 in words is "fifty-two million, sixty-six thousand, six hundred sixty-one".