52716661 has 2 divisors, whose sum is σ = 52716662. Its totient is φ = 52716660.

The previous prime is 52716623. The next prime is 52716683. The reversal of 52716661 is 16661725.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32421636 + 20295025 = 5694^2 + 4505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52716661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52716691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26358330 + 26358331.

It is an arithmetic number, because the mean of its divisors is an integer number (26358331).

Almost surely, 2^52716661 is an apocalyptic number.

It is an amenable number.

52716661 is a deficient number, since it is larger than the sum of its proper divisors (1).

52716661 is an equidigital number, since it uses as much as digits as its factorization.

52716661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 34.

The square root of 52716661 is about 7260.6240089954. The cubic root of 52716661 is about 374.9580065569.

The spelling of 52716661 in words is "fifty-two million, seven hundred sixteen thousand, six hundred sixty-one".