53660261 has 2 divisors, whose sum is σ = 53660262. Its totient is φ = 53660260.

The previous prime is 53660227. The next prime is 53660281. The reversal of 53660261 is 16206635.

53660261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44809636 + 8850625 = 6694^2 + 2975^2 .

It is a cyclic number.

It is not a de Polignac number, because 53660261 - 2¹⁸ = 53398117 is a prime.

It is a super-2 number, since 2×53660261² = 5758847221176242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53660281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26830130 + 26830131.

It is an arithmetic number, because the mean of its divisors is an integer number (26830131).

Almost surely, 2^53660261 is an apocalyptic number.

It is an amenable number.

53660261 is a deficient number, since it is larger than the sum of its proper divisors (1).

53660261 is an equidigital number, since it uses as much as digits as its factorization.

53660261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 53660261 is about 7325.3164436767. The cubic root of 53660261 is about 377.1819721103.

Adding to 53660261 its reverse (16206635), we get a palindrome (69866896).

The spelling of 53660261 in words is "fifty-three million, six hundred sixty thousand, two hundred sixty-one".